S3 Serverless-Inline Storage Utils

Upload images and videos to S3 directly from ComfyUI workflows. Load checkpoints by filename. No environment variables needed - all credentials go directly in the nodes.

Installation

1. Install via ComfyUI-Manager or clone to ComfyUI/custom_nodes
2. Restart ComfyUI
3. Look for nodes in "S3 Serverless Storage" category

Nodes

S3 Image Upload - Upload images as WebP files

• Put your S3 credentials directly in the node
• Images automatically convert to WebP format
• Clean filenames: test123 becomes test123.webp

S3 Video Upload - Upload video files

• Same inline credentials approach
• Keeps original video format
• Clean filenames: myvideo with clip.mp4 becomes myvideo.mp4

S3 Image Load - Download images from S3 URLs

• Works with public URLs and signed URLs
• No credentials needed for public files

String Checkpoint Loader - Load checkpoints by filename

• Load any safetensors/checkpoint file from the checkpoints directory
• Provide filename as string input instead of dropdown selection
• Example: model.safetensors or checkpoint.ckpt

Usage

For AWS S3:

• bucket_name: your bucket name
• access_key_id: your access key
• secret_access_key: your secret key
• region: your AWS region
• endpoint_url: leave empty

For Supabase:

• bucket_name: your bucket name
• access_key_id: your supabase S3 key
• secret_access_key: your supabase S3 secret
• region: us-east-1
• endpoint_url: https://yourproject.supabase.co/storage/v1/s3

For other S3-compatible services:

Fill in your service's S3 endpoint URL.

For String Checkpoint Loader:

• ckpt_filename: Just the filename (e.g., model.safetensors)
• File must exist in your ComfyUI checkpoints directory

Security Note

Don't share workflows with your credentials filled in. Clear the credential fields before sharing workflow files with others.