AUTOMATIC1111 · Forge · ComfyUI · SDXL

Remove Stable Diffusion and ComfyUI Metadata

Local Stable Diffusion tools save everything needed to reproduce an image inside the file. AUTOMATIC1111 and Forge write a parameters text chunk with the prompt, negative prompt, seed, sampler and model. ComfyUI saves the whole node graph. Some pipelines also add an invisible watermark. BlankAI removes the text data and keeps PNG output lossless and transparent.

Runs in your browser. Nothing is uploaded. Reviewed September 25, 2026

Remove PNG info from your renders

Drop up to 20 PNG, JPEG or WebP renders. PNG stays PNG, with transparency.

Drop images here or click to choose

JPG, PNG, WebP, AVIF, HEIC · Up to 20 images · Nothing is uploaded

EXIFGPSXMPIPTCC2PAPNG text

What each tool writes

Layer	Present	Details	BlankAI
PNG text chunks	Yes	AUTOMATIC1111 and Forge: a “parameters” chunk. ComfyUI: “prompt” and “workflow” chunks with the full graph, unless started with --disable-metadata.	Removed
EXIF / XMP / IPTC label	Sometimes	AUTOMATIC1111 and Forge write the same parameters into EXIF UserComment when saving JPEG or WebP.	Removed
C2PA Content Credentials	No	Local tools do not sign their output.	Nothing to remove
Invisible watermark	Sometimes	DWT-DCT watermark by default in the original CompVis SD 1.x script, Stability's SDXL and SVD scripts, and the diffusers SDXL pipeline when invisible-watermark is installed. AUTOMATIC1111, Forge and ComfyUI do not add one.	Not removed
Visible watermark	No	No visible mark.	Nothing to remove

Why remove generation data

A parameters chunk or a ComfyUI workflow is a complete recipe. Anyone who drops your PNG into AUTOMATIC1111's PNG Info tab or onto a ComfyUI canvas gets your prompt, seed, model, LoRAs and settings, and can reproduce or build on your work. Workflows can also contain model file names and paths from your machine.

Keep a private copy

The metadata is useful to you. ComfyUI can reload a whole workflow from its PNG, so keep your originals and share clean copies. You can also stop writing it at the source: AUTOMATIC1111 has a setting to stop saving generation parameters as PNG chunks, and ComfyUI accepts a --disable-metadata flag.

What BlankAI removes, and what it does not

The same rules apply to every file, whatever made it. BlankAI cleans the metadata that travels with a file. It cannot reach anything that is part of the image itself.

Layer	Where it lives	What it holds	BlankAI
EXIF and GPS	File metadata	Camera or phone model, serial numbers, capture time and location coordinates.	Removed
XMP and IPTC	File metadata	Creator tool, edit history, captions, credits and the IPTC Digital Source Type AI label.	Removed
C2PA Content Credentials	Signed manifest inside the file	Who or what created the file and how it was edited, signed by the issuing app.	Removed
PNG text chunks	File metadata	Stable Diffusion prompts, seeds and model names, ComfyUI workflows.	Removed
Invisible watermarks	The pixels	SynthID (Google and OpenAI images), Meta's Content Seal, TikTok and ByteDance watermarks.	Not removed
Visible watermarks	The pixels	Logos, sparkle icons and corner badges drawn onto the image.	Not removed
AI classifiers	The platform	Models that judge an image by how it looks. File metadata plays no part.	Not affected

Questions

Does BlankAI keep transparency?

Yes. With “Same as original”, PNG input is saved as lossless PNG with its alpha channel.

Can other people read my prompt from a PNG?

Yes. The PNG Info tab in AUTOMATIC1111, dragging the file into ComfyUI, or any metadata viewer shows it.

Does BlankAI remove the SDXL invisible watermark?

No. It is part of the pixels, and BlankAI does not alter pixels.