diff --git a/src/CommonFormats.ts b/src/CommonFormats.ts
index b6917399..5bd6f922 100644
--- a/src/CommonFormats.ts
+++ b/src/CommonFormats.ts
@@ -12,7 +12,9 @@ export const Category = {
     SPREADSHEET: "spreadsheet",
     PRESENTATION: "presentation",
     FONT: "font",
-    CODE: "code"
+    CODE: "code",
+    DATABASE: "database",
+    MODEL: "model",
 }
 
 /**
diff --git a/src/handlers/FFmpeg.ts b/src/handlers/FFmpeg.ts
index 33a62c2a..bde91a95 100644
--- a/src/handlers/FFmpeg.ts
+++ b/src/handlers/FFmpeg.ts
@@ -5,7 +5,7 @@ import type { LogEvent } from "@ffmpeg/ffmpeg";
 
 import mime from "mime";
 import normalizeMimeType from "../normalizeMimeType.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 class FFmpegHandler implements FormatHandler {
 
@@ -220,7 +220,7 @@ class FFmpegHandler implements FormatHandler {
       from: true,
       to: true,
       internal: "mov",
-      category: "audio",
+      category: Category.AUDIO,
       lossless: false
     });
 
@@ -233,7 +233,7 @@ class FFmpegHandler implements FormatHandler {
       from: true,
       to: true,
       internal: "asf",
-      category: "video"
+      category: Category.VIDEO
     });
 
     // Normalize Bink metadata to ensure ".bik" files are detected by extension.
diff --git a/src/handlers/als.ts b/src/handlers/als.ts
index c3379f18..4b1fc2cd 100644
--- a/src/handlers/als.ts
+++ b/src/handlers/als.ts
@@ -1,5 +1,5 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 class alsHandler implements FormatHandler {
 
@@ -14,7 +14,7 @@ class alsHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "als",
-      category: "data",
+      category: Category.DATA,
       lossless: true
     },
     CommonFormats.XML.builder("xml").allowTo(),
diff --git a/src/handlers/aperturePicture.ts b/src/handlers/aperturePicture.ts
index e1c2ac83..f26a1200 100644
--- a/src/handlers/aperturePicture.ts
+++ b/src/handlers/aperturePicture.ts
@@ -1,5 +1,5 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 class aperturePictureHandler implements FormatHandler {
   public name: string = "aperturePicture";
@@ -16,7 +16,7 @@ class aperturePictureHandler implements FormatHandler {
         from: true,
         to: false,
         internal: "apf",
-        category: ["image"],
+        category: Category.IMAGE,
         lossless: true,
       },
       CommonFormats.BMP.builder("bmp")
diff --git a/src/handlers/aseprite.ts b/src/handlers/aseprite.ts
index a81a4b7a..3b340528 100644
--- a/src/handlers/aseprite.ts
+++ b/src/handlers/aseprite.ts
@@ -1,5 +1,5 @@
 import pako from "pako";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
 
 const ASEPRITE_HEADER_MAGIC = 0xA5E0;
@@ -418,7 +418,7 @@ class asepriteHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "aseprite",
-      category: "image",
+      category: Category.IMAGE,
       lossless: true
     },
     CommonFormats.PNG.supported("png", false, true, true),
diff --git a/src/handlers/bsor.ts b/src/handlers/bsor.ts
index dc723212..947deb2d 100644
--- a/src/handlers/bsor.ts
+++ b/src/handlers/bsor.ts
@@ -1,7 +1,7 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
 import { Replay } from "./bsor/replay.ts";
 import { render } from "./bsor/renderer.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 class bsorHandler implements FormatHandler {
   public name: string = "bsor";
@@ -14,7 +14,7 @@ class bsorHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "bsor",
-      category: "data",
+      category: Category.DATA,
       lossless: false
     },
     CommonFormats.PNG.supported("png", false, true),
diff --git a/src/handlers/bunburrows.ts b/src/handlers/bunburrows.ts
index 1dfb81e2..858475ea 100644
--- a/src/handlers/bunburrows.ts
+++ b/src/handlers/bunburrows.ts
@@ -1,7 +1,7 @@
 // file: bunburrows.ts
 
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 const COLOR_WALKABLE = [0,0,0];
 const COLOR_BREAKABLE = [98,135,64];
@@ -28,7 +28,7 @@ class bunburrowsHandler implements FormatHandler {
                 from: true,
                 to: false,
                 internal: "bunlevel",
-                category: "data",
+                category: Category.DATA,
                 lossless: false,
             },
         ];
diff --git a/src/handlers/celariaMap.ts b/src/handlers/celariaMap.ts
index 672c5a7c..f7148958 100644
--- a/src/handlers/celariaMap.ts
+++ b/src/handlers/celariaMap.ts
@@ -7,7 +7,7 @@ import { PlayerSpawnPoint } from "celaria-formats/class/maps/objects/PlayerSpawn
 import { Sphere } from "celaria-formats/class/maps/objects/Sphere.mjs"
 import { TutorialHologram } from "celaria-formats/class/maps/objects/TutorialHologram.mjs"
 import type { FlatVector3, Vector3 } from "celaria-formats/types/data.mts"
-import CommonFormats from "src/CommonFormats.ts"
+import CommonFormats, { Category } from "src/CommonFormats.ts"
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts"
 
 class celariaMapHandler implements FormatHandler {
@@ -25,7 +25,7 @@ class celariaMapHandler implements FormatHandler {
 				from: false,
 				to: true,
 				internal: "obj",
-				category: "model",
+				category: Category.MODEL,
 				lossless: false,
 			},
 			CommonFormats.JSON.builder("json").allowFrom(true).allowTo(true).markLossless(false),
@@ -37,7 +37,7 @@ class celariaMapHandler implements FormatHandler {
 				from: true,
 				to: true,
 				internal: "ecmap",
-				category: "data",
+				category: Category.DATA,
 				lossless: false,
 			},
 			{
@@ -48,7 +48,7 @@ class celariaMapHandler implements FormatHandler {
 				from: true,
 				to: false,
 				internal: "cmap",
-				category: "data",
+				category: Category.DATA,
 				lossless: false,
 			},
 		]
diff --git a/src/handlers/cgbi-to-png.ts b/src/handlers/cgbi-to-png.ts
index ebf8a48d..fa3c1818 100644
--- a/src/handlers/cgbi-to-png.ts
+++ b/src/handlers/cgbi-to-png.ts
@@ -1,6 +1,6 @@
 import pako from "pako";
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 async function revertCgBIBuffer(input: Uint8Array | ArrayBuffer): Promise<Uint8Array> {
   const buffer = input instanceof Uint8Array ? input : new Uint8Array(input);
@@ -156,7 +156,7 @@ class cgbiToPngHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "cgbi-png", 
-      category: "image",
+      category: Category.IMAGE,
       lossless: true
     },
     CommonFormats.PNG.supported("png", false, true, true),
diff --git a/src/handlers/curani.ts b/src/handlers/curani.ts
index 0f65d4cb..9b0998c3 100644
--- a/src/handlers/curani.ts
+++ b/src/handlers/curani.ts
@@ -1,7 +1,7 @@
 // file: curani.ts
 
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 function read_lendian(x : number, y: number): number {
     return x + (y * 16 * 16);
@@ -23,7 +23,7 @@ class curaniHandler implements FormatHandler {
                 from: true,
                 to: true,
                 internal: "ani",
-                category: "image",
+                category: Category.IMAGE,
                 lossless: false,
             },
             {
@@ -34,7 +34,7 @@ class curaniHandler implements FormatHandler {
                 from: true,
                 to: true,
                 internal: "cur",
-                category: "image",
+                category: Category.IMAGE,
                 lossless: false,
             },
             {
@@ -45,7 +45,7 @@ class curaniHandler implements FormatHandler {
                 from: true,
                 to: true,
                 internal: "ico",
-                category: "image",
+                category: Category.IMAGE,
                 lossless: false,
             }
         ];
diff --git a/src/handlers/cybergrindHandler.ts b/src/handlers/cybergrindHandler.ts
index 6b59d0d4..f7bddfd4 100644
--- a/src/handlers/cybergrindHandler.ts
+++ b/src/handlers/cybergrindHandler.ts
@@ -1,5 +1,5 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 class cybergrindHandler implements FormatHandler {
     public name: string = "cybergrind";
@@ -17,7 +17,7 @@ class cybergrindHandler implements FormatHandler {
                 format: "cgp",
                 extension: "cgp",
                 mime: "text/plain",
-                category: "data",
+                category: Category.DATA,
                 from: false,
                 to: true,
                 internal: "cgp",
diff --git a/src/handlers/envelope.ts b/src/handlers/envelope.ts
index 4eb74436..cd7e8649 100644
--- a/src/handlers/envelope.ts
+++ b/src/handlers/envelope.ts
@@ -4,7 +4,7 @@ import { parseODT, parseODP, parseODS } from "./envelope/parseODF.js";
 import parseDOCX from "./envelope/parseDOCX.js";
 import parsePPTX from "./envelope/parsePPTX.js";
 import parseXLSX from "./envelope/parseXLSX.js";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 class envelopeHandler implements FormatHandler {
 
@@ -23,7 +23,7 @@ class envelopeHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "odt",
-      category: "document",
+      category: Category.DOCUMENT,
       lossless: false
     },
     {
@@ -34,7 +34,7 @@ class envelopeHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "odp",
-      category: "presentation",
+      category: Category.PRESENTATION,
       lossless: false
     },
     {
@@ -45,7 +45,7 @@ class envelopeHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "ods",
-      category: "spreadsheet",
+      category: Category.SPREADSHEET,
       lossless: false
     },
     // Technically not "lossless", but it's about as close as we'll ever get
diff --git a/src/handlers/flo.ts b/src/handlers/flo.ts
index 7f863fa6..d3e1eff6 100644
--- a/src/handlers/flo.ts
+++ b/src/handlers/flo.ts
@@ -1,6 +1,6 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
 import normalizeMimeType from "../normalizeMimeType.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 import { FFmpeg } from "@ffmpeg/ffmpeg";
 
 function interleaveAudioBuffer(buffer: AudioBuffer): Float32Array {
@@ -187,7 +187,7 @@ class floHandler implements FormatHandler {
         from: true,
         to: true,
         internal: "flo",
-        category: "audio",
+        category: Category.AUDIO,
         lossless: false
       },
       CommonFormats.WAV.builder("wav")
@@ -200,7 +200,7 @@ class floHandler implements FormatHandler {
         from: true,
         to: true,
         internal: "f32le",
-        category: "audio",
+        category: Category.AUDIO,
         lossless: true
       },
     ];
diff --git a/src/handlers/flptojson.ts b/src/handlers/flptojson.ts
index 0214dbcf..1a1d8736 100644
--- a/src/handlers/flptojson.ts
+++ b/src/handlers/flptojson.ts
@@ -3,7 +3,7 @@
 
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
 import { Buffer } from "buffer";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 if (typeof window !== "undefined") {
   (window as any).Buffer = Buffer;
@@ -32,7 +32,7 @@ class flptojsonHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "flp",
-      category: "audio",
+      category: Category.AUDIO,
       lossless: false,
     },
     // Unsure about this, it might be lossless
diff --git a/src/handlers/jsonToC.ts b/src/handlers/jsonToC.ts
index d6051da0..f25121ed 100644
--- a/src/handlers/jsonToC.ts
+++ b/src/handlers/jsonToC.ts
@@ -1,7 +1,7 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
 import {JsonType} from "./jsonToC/JsonType.ts";
 import JsonTypeFactory from "./jsonToC/JsonTypeFactory.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 export default class jsonToCHandler implements FormatHandler {
     /**************************************************/
@@ -18,7 +18,7 @@ export default class jsonToCHandler implements FormatHandler {
             from: true,
             to: true,
             internal: "c",
-            category: "code"
+            category: Category.CODE
         },
         CommonFormats.JSON.supported("json", true, true)
     ];
diff --git a/src/handlers/libopenmpt.ts b/src/handlers/libopenmpt.ts
index 7e6bd344..7b881040 100644
--- a/src/handlers/libopenmpt.ts
+++ b/src/handlers/libopenmpt.ts
@@ -1,5 +1,5 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 interface LibOpenMPTModule {
   __render(fileData: Uint8Array, sampleRate: number): Int16Array;
@@ -120,7 +120,7 @@ class libopenmptHandler implements FormatHandler {
         from: true,
         to: false,
         internal: fmt.ext,
-        category: "audio",
+        category: Category.AUDIO,
         lossless: true
       });
     }
diff --git a/src/handlers/lzh.ts b/src/handlers/lzh.ts
index 63394ab1..a0a90001 100644
--- a/src/handlers/lzh.ts
+++ b/src/handlers/lzh.ts
@@ -2,7 +2,7 @@ import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
 import { LZHDecoder } from "./lzh/decoder.ts";
 import { LZHEncoder, type LHAFileInput } from "./lzh/encoder.ts";
 import JSZip from "jszip";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 import normalizeMimeType from "../normalizeMimeType.ts";
 import mime from "mime";
 
@@ -27,7 +27,7 @@ class LZHHandler implements FormatHandler {
       from: true,
       to: true,
       internal: "lzh",
-      category: "archive",
+      category: Category.ARCHIVE,
       lossless: true
     },
     CommonFormats.ZIP.builder("zip").allowFrom()
diff --git a/src/handlers/mcSchematicHandler.ts b/src/handlers/mcSchematicHandler.ts
index 606a199b..01ecc79b 100644
--- a/src/handlers/mcSchematicHandler.ts
+++ b/src/handlers/mcSchematicHandler.ts
@@ -1,6 +1,7 @@
 import type { FileData, FileFormat, FormatHandler } from "src/FormatHandler";
 import * as NBT from "nbtify";
 import { gunzipSync, gzipSync } from "fflate";
+import { Category } from "src/CommonFormats.ts";
 
 class mcSchematicHandler implements FormatHandler {
     public name: string = "mcSchematic";
@@ -17,7 +18,7 @@ class mcSchematicHandler implements FormatHandler {
                 from: true,
                 to: true,
                 internal: "schematic",
-                category: "data",
+                category: Category.DATA,
                 lossless: true
             },
             {
@@ -28,7 +29,7 @@ class mcSchematicHandler implements FormatHandler {
                 from: true,
                 to: true,
                 internal: "schem",
-                category: "data",
+                category: Category.DATA,
                 lossless: true
             },
             {
@@ -39,7 +40,7 @@ class mcSchematicHandler implements FormatHandler {
                 from: true,
                 to: true,
                 internal: "litematic",
-                category: "data",
+                category: Category.DATA,
                 lossless: true
             },
             // Target internal format for graph routing
@@ -51,7 +52,7 @@ class mcSchematicHandler implements FormatHandler {
                 from: false,
                 to: true,
                 internal: "nbt",
-                category: "data",
+                category: Category.DATA,
                 lossless: true
             }
         ];
diff --git a/src/handlers/mcmap.ts b/src/handlers/mcmap.ts
index 876dfecf..5675dc23 100644
--- a/src/handlers/mcmap.ts
+++ b/src/handlers/mcmap.ts
@@ -1,5 +1,5 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 import pako from "pako";
 import * as NBT from "nbtify";
@@ -95,7 +95,7 @@ class mcMapHandler implements FormatHandler {
                 from: false,
                 to: true,
                 internal: "rgb",
-                category: "image",
+                category: Category.IMAGE,
                 lossless: true
             },
             {
@@ -106,7 +106,7 @@ class mcMapHandler implements FormatHandler {
                 from: true,
                 to: true,
                 internal: "mcmap",
-                category: "data",
+                category: Category.DATA,
                 lossless: false
             },
             {
@@ -117,7 +117,7 @@ class mcMapHandler implements FormatHandler {
                 from: false,
                 to: true,
                 internal: "mcmap_grid",
-                category: "data",
+                category: Category.DATA,
                 lossless: false
             }
         ];
diff --git a/src/handlers/midi.ts b/src/handlers/midi.ts
index ee2c5130..893d0508 100644
--- a/src/handlers/midi.ts
+++ b/src/handlers/midi.ts
@@ -1,6 +1,6 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
 import { extractEvents, tableToString, stringToTable, buildMidi, parseRtttl, parseGrubTune, tableToRtttl, tableToGrubTune, pngToMidi, midiToPng } from "./midi/midifilelib.js";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 const SAMPLE_RATE = 44100;
 const BUFFER_FRAMES = 4096;
@@ -83,10 +83,10 @@ export class midiCodecHandler implements FormatHandler {
 
   async init(): Promise<void> {
     this.supportedFormats.push(
-      { name: "MIDI",          format: "mid",    extension: "mid",    mime: "audio/midi",   from: true,  to: true,  internal: "mid",   category: "audio", lossless: true },
-      { name: "RTTTL",         format: "rtttl",  extension: "rtttl",  mime: "audio/rtttl",  from: true,  to: true,  internal: "rtttl", category: "text",  lossless: false },
-      { name: "NokRing",       format: "rtttl",  extension: "nokring",mime: "audio/rtttl",  from: true,  to: false, internal: "rtttl", category: "text",  lossless: false },
-      { name: "GRUB Init Tune",format: "grub",   extension: "grub",   mime: "text/plain",   from: true,  to: true,  internal: "grub",  category: "text",  lossless: false },
+      { name: "MIDI",          format: "mid",    extension: "mid",    mime: "audio/midi",   from: true,  to: true,  internal: "mid",   category: Category.AUDIO, lossless: true },
+      { name: "RTTTL",         format: "rtttl",  extension: "rtttl",  mime: "audio/rtttl",  from: true,  to: true,  internal: "rtttl", category: Category.TEXT,  lossless: false },
+      { name: "NokRing",       format: "rtttl",  extension: "nokring",mime: "audio/rtttl",  from: true,  to: false, internal: "rtttl", category: Category.TEXT,  lossless: false },
+      { name: "GRUB Init Tune",format: "grub",   extension: "grub",   mime: "text/plain",   from: true,  to: true,  internal: "grub",  category: Category.TEXT,  lossless: false },
       CommonFormats.TEXT.builder("txt").allowFrom().allowTo().markLossless(),
       // PNG spectrogram -> MIDI (matches meyda's internal="image" so routing picks
       // up the audio->png->mid path automatically)
@@ -209,7 +209,7 @@ export class midiSynthHandler implements FormatHandler {
     this.#sfontBin = sfontBin;
 
     this.supportedFormats.push(
-      { name: "MIDI",           format: "mid", extension: "mid", mime: "audio/midi", from: true,  to: false, internal: "mid", category: "audio", lossless: true },
+      { name: "MIDI",           format: "mid", extension: "mid", mime: "audio/midi", from: true,  to: false, internal: "mid", category: Category.AUDIO, lossless: true },
       CommonFormats.WAV.builder("wav").allowTo().markLossless()
     );
 
diff --git a/src/handlers/n64rom.ts b/src/handlers/n64rom.ts
index df83e11d..72a81d8c 100644
--- a/src/handlers/n64rom.ts
+++ b/src/handlers/n64rom.ts
@@ -1,6 +1,6 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
 import normalizeMimeType from "../normalizeMimeType.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 const ROM_MAGIC = {
   z64: [0x80, 0x37, 0x12, 0x40],
@@ -25,7 +25,7 @@ class n64romHandler implements FormatHandler {
       from: true,
       to: true,
       internal: "z64",
-      category: "data",
+      category: Category.DATA,
       lossless: true
     },
     {
@@ -36,7 +36,7 @@ class n64romHandler implements FormatHandler {
       from: true,
       to: true,
       internal: "n64",
-      category: "data",
+      category: Category.DATA,
       lossless: true
     },
     {
@@ -47,7 +47,7 @@ class n64romHandler implements FormatHandler {
       from: true,
       to: true,
       internal: "v64",
-      category: "data",
+      category: Category.DATA,
       lossless: true
     },
     CommonFormats.PNG.builder("n64png")
diff --git a/src/handlers/nbt.ts b/src/handlers/nbt.ts
index 6188d12a..7eae948a 100644
--- a/src/handlers/nbt.ts
+++ b/src/handlers/nbt.ts
@@ -1,6 +1,6 @@
-import type { FileData, FileFormat, FormatHandler } from "src/FormatHandler";
+import type { FileData, FileFormat, FormatHandler } from "src/FormatHandler.ts";
 import * as NBT from "nbtify";
-import CommonFormats from "src/CommonFormats";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 import { gzipSync, gunzipSync } from "fflate";
 
 class nbtHandler implements FormatHandler {
@@ -20,7 +20,7 @@ class nbtHandler implements FormatHandler {
                 from: true,
                 to: true,
                 internal: "nbt",
-                category: "data",
+                category: Category.DATA,
                 lossless: true
             },
             CommonFormats.JSON.supported("json", true, true, true),
@@ -32,7 +32,7 @@ class nbtHandler implements FormatHandler {
                 from: true,
                 to: true,
                 internal: "snbt",
-                category: "data",
+                category: Category.DATA,
                 lossless: true // only compression data is lost
             },
         ]
diff --git a/src/handlers/ota.ts b/src/handlers/ota.ts
index 6c0730bf..6a9e2299 100644
--- a/src/handlers/ota.ts
+++ b/src/handlers/ota.ts
@@ -1,7 +1,7 @@
 // file: ota.ts
 
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 class otaHandler implements FormatHandler {
 
@@ -23,7 +23,7 @@ class otaHandler implements FormatHandler {
                 from: true,
                 to: true,
                 internal: "ota",
-                category: "image",
+                category: Category.IMAGE,
                 lossless: false,
             },
         ];
diff --git a/src/handlers/petozip.ts b/src/handlers/petozip.ts
index 43632376..19c18d05 100644
--- a/src/handlers/petozip.ts
+++ b/src/handlers/petozip.ts
@@ -6,7 +6,7 @@ import * as Pe from "pe-library";
 import JSZip from "jszip";
 
 import { Buffer } from "buffer";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 if (typeof window !== "undefined") {
   (window as any).Buffer = Buffer;
 }
@@ -25,7 +25,7 @@ class peToZipHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "dll",
-      category: "code",
+      category: Category.CODE,
       lossless: false
     },
     CommonFormats.ZIP.builder("zip").allowTo().markLossless()
diff --git a/src/handlers/piskel.ts b/src/handlers/piskel.ts
index 4f07cfcb..905b29b8 100644
--- a/src/handlers/piskel.ts
+++ b/src/handlers/piskel.ts
@@ -1,5 +1,5 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 import JSZip from "jszip";
 
 class piskelHandler implements FormatHandler {
@@ -28,7 +28,7 @@ class piskelHandler implements FormatHandler {
                 mime: "image/png+json",
                 from: true,
                 to: false,
-                category: "image",
+                category: Category.IMAGE,
                 internal: "piskel",
                 lossless: true
             }
diff --git a/src/handlers/qoa-fu.ts b/src/handlers/qoa-fu.ts
index b08fcb12..4eaf0659 100644
--- a/src/handlers/qoa-fu.ts
+++ b/src/handlers/qoa-fu.ts
@@ -1,5 +1,5 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 import { QOAEncoder, QOADecoder, QOABase } from "qoa-fu";
 import { WaveFile } from "wavefile";
 
@@ -56,7 +56,7 @@ class qoaFuHandler implements FormatHandler {
       from: true,
       to: true,
       internal: "qoa",
-      category: "audio",
+      category: Category.AUDIO,
       lossless: false
     }
   ];
diff --git a/src/handlers/qoi-fu.ts b/src/handlers/qoi-fu.ts
index 616bbd48..c73c5fbd 100644
--- a/src/handlers/qoi-fu.ts
+++ b/src/handlers/qoi-fu.ts
@@ -1,4 +1,4 @@
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
 
 import { QOIDecoder, QOIEncoder } from "qoi-fu";
@@ -20,7 +20,7 @@ class qoiFuHandler implements FormatHandler {
       from: true,
       to: true,
       internal: "qoi",
-      category: "image",
+      category: Category.IMAGE,
       lossless: true
     }
   ];
diff --git a/src/handlers/rename.ts b/src/handlers/rename.ts
index b3261e83..1fcebe6c 100644
--- a/src/handlers/rename.ts
+++ b/src/handlers/rename.ts
@@ -36,7 +36,7 @@ export const renameZipHandler = renameHandler("renamezip", [
     from: true,
     to: false,
     internal: "odt",
-    category: "document",
+    category: Category.DOCUMENT,
     lossless: true
   },
   {
@@ -47,7 +47,7 @@ export const renameZipHandler = renameHandler("renamezip", [
     from: true,
     to: false,
     internal: "odp",
-    category: "presentation",
+    category: Category.PRESENTATION,
     lossless: true
   },
   {
@@ -58,7 +58,7 @@ export const renameZipHandler = renameHandler("renamezip", [
     from: true,
     to: false,
     internal: "ods",
-    category: "spreadsheet",
+    category: Category.SPREADSHEET,
     lossless: true
   },
   {
@@ -69,7 +69,7 @@ export const renameZipHandler = renameHandler("renamezip", [
     from: true,
     to: false,
     internal: "xpi",
-    category: "archive",
+    category: Category.ARCHIVE,
     lossless: true
   },
   CommonFormats.ZIP.builder("love").allowFrom()
@@ -88,7 +88,7 @@ export const renameZipHandler = renameHandler("renamezip", [
     from: true,
     to: false,
     internal: "jar",
-    category: "archive",
+    category: Category.ARCHIVE,
     lossless: true
   },
   {
@@ -99,7 +99,7 @@ export const renameZipHandler = renameHandler("renamezip", [
     from: true,
     to: false,
     internal: "apk",
-    category: "archive",
+    category: Category.ARCHIVE,
     lossless: true
   },
   CommonFormats.ZIP.builder("sb3").allowFrom()
@@ -116,7 +116,7 @@ export const renameZipHandler = renameHandler("renamezip", [
     from: true,
     to: false,
     internal: "cbz",
-    category: "archive",
+    category: Category.ARCHIVE,
     lossless: true
   },
 ]);
@@ -137,7 +137,7 @@ export const renameJsonHandler = renameHandler("renamejson", [
     mime: "application/har+json",
     from: true,
     to: false,
-    category: "archive",
+    category: Category.ARCHIVE,
     internal: "har"
   },
   {
@@ -147,7 +147,7 @@ export const renameJsonHandler = renameHandler("renamejson", [
     mime: "image/png+json",
     from: true,
     to: false,
-    category: "image",
+    category: Category.IMAGE,
     internal: "piskel",
     lossless: true
   }
diff --git a/src/handlers/rgba.ts b/src/handlers/rgba.ts
index 3f012dea..aa15c7c2 100644
--- a/src/handlers/rgba.ts
+++ b/src/handlers/rgba.ts
@@ -1,7 +1,7 @@
 // file: rgba.ts
 
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 class rgbaHandler implements FormatHandler {
 
@@ -23,7 +23,7 @@ class rgbaHandler implements FormatHandler {
                 from: true,
                 to: true,
                 internal: "rgb",
-                category: "image",
+                category: Category.IMAGE,
                 lossless: false
             },
             {
@@ -34,7 +34,7 @@ class rgbaHandler implements FormatHandler {
                 from: true,
                 to: true,
                 internal: "rgba",
-                category: "image",
+                category: Category.IMAGE,
                 lossless: true
             },
         ];
diff --git a/src/handlers/rpgmvp.ts b/src/handlers/rpgmvp.ts
index ed646cfd..9d3c25c9 100644
--- a/src/handlers/rpgmvp.ts
+++ b/src/handlers/rpgmvp.ts
@@ -1,5 +1,5 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 import { Decrypter } from "./rpgmvp-decrypter/scripts/Decrypter.js";
 import { RPGFile } from "./rpgmvp-decrypter/scripts/RPGFile.js";
 
@@ -19,7 +19,7 @@ class rpgmvpHandler implements FormatHandler {
                 from: true,
                 to: false,
                 internal: "rpgmvp",
-                category: "image",
+                category: Category.IMAGE,
                 lossless: true
             },
             CommonFormats.PNG.builder("png")
diff --git a/src/handlers/sppd.ts b/src/handlers/sppd.ts
index a8f9738d..a8ede760 100644
--- a/src/handlers/sppd.ts
+++ b/src/handlers/sppd.ts
@@ -5,7 +5,7 @@ import * as CSG from "three-bvh-csg";
 
 import { Demo } from "./sppd/sppd/Demo.ts";
 import { Vector } from "./sppd/sppd/Vector.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 function toThreeVector (vec: Vector) {
   return new THREE.Vector3(vec.y, vec.z, vec.x);
@@ -186,7 +186,7 @@ class sppdHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "dem",
-      category: "data",
+      category: Category.DATA,
       lossless: false
     },
     CommonFormats.PNG.supported("png", false, true),
diff --git a/src/handlers/sqlite.ts b/src/handlers/sqlite.ts
index 61b4eaf3..a73d38a9 100644
--- a/src/handlers/sqlite.ts
+++ b/src/handlers/sqlite.ts
@@ -1,4 +1,4 @@
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
 import sqlite3InitModule from "@sqlite.org/sqlite-wasm";
 import {parse} from "papaparse";
@@ -19,7 +19,7 @@ class sqlite3Handler implements FormatHandler {
         from: true,
         to: true,
         internal: "sqlite3",
-        category: "database",
+        category: Category.DATABASE,
         lossless: false
       },
       {
@@ -30,7 +30,7 @@ class sqlite3Handler implements FormatHandler {
         from: true,
         to: false,
         internal: "sqlite3",
-        category: "database",
+        category: Category.DATABASE,
         lossless: false
       },
       // Lossy because extracts only tables  
diff --git a/src/handlers/terrariawld.ts b/src/handlers/terrariawld.ts
index 7a5f1e3c..a00dfd33 100644
--- a/src/handlers/terrariawld.ts
+++ b/src/handlers/terrariawld.ts
@@ -1,5 +1,5 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 import { FileReader } from "src/handlers/terraria-wld-parser/src/";
 
 // CODE BELOW IS WRITTEN BY PIXELKAT5 IN PR #244
@@ -888,7 +888,7 @@ class terrariaWldHandler implements FormatHandler {
                 from: true,
                 to: false,
                 internal: "wld",
-                category: "data",
+                category: Category.DATA,
                 lossless: false,
             },
 
diff --git a/src/handlers/textToSource.ts b/src/handlers/textToSource.ts
index 925333d1..a0b3f0ce 100644
--- a/src/handlers/textToSource.ts
+++ b/src/handlers/textToSource.ts
@@ -1,7 +1,7 @@
 // file: textToSource.ts
 
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 function python(text: string): string {
   return `print(${JSON.stringify(text)})`;
@@ -69,7 +69,7 @@ class textToSourceHandler implements FormatHandler {
       from: false,
       to: true,
       internal: "js",
-      category: "code",
+      category: Category.CODE,
       lossless: true,
     }, javascript],
     [{
@@ -80,7 +80,7 @@ class textToSourceHandler implements FormatHandler {
       from: false,
       to: true,
       internal: "c",
-      category: "code",
+      category: Category.CODE,
       lossless: true,
     }, c],
     [{
@@ -91,7 +91,7 @@ class textToSourceHandler implements FormatHandler {
       from: false,
       to: true,
       internal: "cpp",
-      category: "code",
+      category: Category.CODE,
       lossless: true,
     }, cpp],
     [{
@@ -102,7 +102,7 @@ class textToSourceHandler implements FormatHandler {
       from: false,
       to: true,
       internal: "go",
-      category: "code",
+      category: Category.CODE,
       lossless: true,
     }, go],
     [CommonFormats.BATCH.builder("bat").allowTo().markLossless(), batch],
@@ -115,7 +115,7 @@ class textToSourceHandler implements FormatHandler {
       from: false,
       to: true,
       internal: "csharp",
-      category: "code",
+      category: Category.CODE,
       lossless: true,
     }, csharp],
     [{
@@ -126,7 +126,7 @@ class textToSourceHandler implements FormatHandler {
       from: false,
       to: true,
       internal: "rs",
-      category: "code",
+      category: Category.CODE,
       lossless: true,
     }, rust],
   ];
diff --git a/src/handlers/threejs.ts b/src/handlers/threejs.ts
index 5e460cf3..da893cdb 100644
--- a/src/handlers/threejs.ts
+++ b/src/handlers/threejs.ts
@@ -1,4 +1,4 @@
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
 
 import * as THREE from "three";
@@ -18,7 +18,7 @@ class threejsHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "glb",
-      category: "model",
+      category: Category.MODEL,
       lossless: false
     },
     {
@@ -29,7 +29,7 @@ class threejsHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "glb",
-      category: "model",
+      category: Category.MODEL,
       lossless: false
     },
     {
@@ -40,7 +40,7 @@ class threejsHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "obj",
-      category: "model",
+      category: Category.MODEL,
       lossless: false,
     },
     CommonFormats.PNG.supported("png", false, true),
diff --git a/src/handlers/turbowarp.ts b/src/handlers/turbowarp.ts
index 1c61caec..2640fca2 100644
--- a/src/handlers/turbowarp.ts
+++ b/src/handlers/turbowarp.ts
@@ -1,7 +1,7 @@
 // file: turbowarp.ts
 
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 import { Packager, largeAssets, downloadProject } from "turbowarp-packager-browser";
 
 // patching some assets
@@ -21,7 +21,7 @@ class turbowarpHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "sb3",
-      category: "archive",
+      category: Category.ARCHIVE,
       lossless: false,
     },
     CommonFormats.HTML.builder("html")
diff --git a/src/handlers/txtToInfiniteCraft.ts b/src/handlers/txtToInfiniteCraft.ts
index e4e37220..acc07b78 100644
--- a/src/handlers/txtToInfiniteCraft.ts
+++ b/src/handlers/txtToInfiniteCraft.ts
@@ -1,5 +1,5 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 class txtToInfiniteCraftHandler implements FormatHandler {
 
@@ -18,7 +18,7 @@ class txtToInfiniteCraftHandler implements FormatHandler {
                 from: false,
                 to: true,
                 internal: "ic",
-                category: "archive",
+                category: Category.ARCHIVE,
                 lossless: false
             },
         ];
diff --git a/src/handlers/vexflow.ts b/src/handlers/vexflow.ts
index 5a396f77..8861c8c9 100644
--- a/src/handlers/vexflow.ts
+++ b/src/handlers/vexflow.ts
@@ -1,7 +1,7 @@
 import * as vexml from '@stringsync/vexml';
 import VexFlow from 'vexflow';
-import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from 'src/CommonFormats.ts';
+import type { FileData, FileFormat, FormatHandler } from '../FormatHandler.ts';
+import CommonFormats, { Category } from 'src/CommonFormats.ts';
 import { buildMidi, addNote } from './midi/midifilelib.js';
 
 class VexFlowHandler implements FormatHandler {
@@ -16,7 +16,7 @@ class VexFlowHandler implements FormatHandler {
       CommonFormats.MUSICXML.builder("musicxml").allowFrom(),
       CommonFormats.MXL.builder("mxl").allowFrom(),
       CommonFormats.HTML.builder("html").allowTo(),
-      { name: "MIDI", format: "mid", extension: "mid", mime: "audio/midi", from: false, to: true, internal: "mid", category: "audio", lossless: false }
+      { name: "MIDI", format: "mid", extension: "mid", mime: "audio/midi", from: false, to: true, internal: "mid", category: Category.AUDIO, lossless: false }
     ];
     
     // Load VexFlow fonts (required for VexFlow 5)
diff --git a/src/handlers/vtf.ts b/src/handlers/vtf.ts
index 3114e3e8..8f77dea0 100644
--- a/src/handlers/vtf.ts
+++ b/src/handlers/vtf.ts
@@ -1,4 +1,4 @@
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
 
 const TEXTUREFLAGS_ENVMAP = 0x00004000;
@@ -809,7 +809,7 @@ class vtfHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "vtf",
-      category: "image",
+      category: Category.IMAGE,
       lossless: false
     },
     CommonFormats.PNG.supported("png", false, true, true),
diff --git a/src/handlers/xcf.ts b/src/handlers/xcf.ts
index 38f57907..8143d342 100644
--- a/src/handlers/xcf.ts
+++ b/src/handlers/xcf.ts
@@ -1,5 +1,5 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 import XCF from "./gimper/src/main.js";
 
 class xcfHandler implements FormatHandler {
@@ -21,7 +21,7 @@ class xcfHandler implements FormatHandler {
                 from: true,
                 to: false,
                 internal: "xcf",
-                category: "image",
+                category: Category.IMAGE,
                 lossless: true
             },
             CommonFormats.PNG.builder("png")
diff --git a/src/handlers/xcursor.ts b/src/handlers/xcursor.ts
index fe8a5b8f..095bd81f 100644
--- a/src/handlers/xcursor.ts
+++ b/src/handlers/xcursor.ts
@@ -1,5 +1,5 @@
 import type { FileData, FileFormat, FormatHandler } from "../FormatHandler.ts";
-import CommonFormats from "src/CommonFormats.ts";
+import CommonFormats, { Category } from "src/CommonFormats.ts";
 
 class xcursorHandler implements FormatHandler {
 
@@ -15,7 +15,7 @@ class xcursorHandler implements FormatHandler {
       from: true,
       to: false,
       internal: "xcur",
-      category: "image",
+      category: Category.IMAGE,
       lossless: true
     },
   ];