You want to share the finished image, not the recipe behind it. But a PNG saved from ComfyUI can carry both. Prompts, node settings and the workflow graph may travel inside the picture without appearing anywhere in the preview.
That is useful when you want to recreate an image. It is worth checking before sending a client a final file or posting work whose production details you intended to keep private.
Why a ComfyUI PNG can be flagged as AI-related
An AI-related finding does not have to come from a visual detector or Content Credentials. A file inspector can recognize generation information stored as ordinary PNG text metadata.
In a public Reddit discussion, someone asked how to embed a prompt without keeping a separate text file. The replies pointed to ComfyUI's embedded metadata. The same convenience creates the sharing problem: the image can already contain the information you thought was separate.
For this workflow, inspect the actual PNG you are sending. A thumbnail tells you what the image looks like, not what its container carries.
What “prompt” and “workflow” actually contain
ComfyUI's official documentation distinguishes two JSON fields. workflow holds the graph, including nodes, links and layout. prompt holds the execution-oriented nodes and inputs. Despite its name, the latter is not necessarily just your written prompt.
The built-in PNG saving path writes these as text entries when metadata saving is enabled and the information is supplied. Custom nodes can add extra fields. Depending on your graph, the stored inputs can reveal prompt text, model selections and generation settings.
This is not the same as a signed C2PA record. It is readable generation data, and a file can contain one of the two fields without the other. Nor is an embedded graph a complete project archive: ComfyUI says it does not include the model files, input assets or custom-node packages it depends on.
Before sharing, separate the image from its recipe
Use FreeAIWiper to prepare the sharing copy. Its PNG cleaner recognizes the exact prompt and workflow metadata keys, alongside other supported generation markers.
- Keep your working version. Save the original PNG and a separate workflow JSON with the assets you need. Cleaning your only embedded workflow would remove a useful recovery route.
- Inspect the final PNG. Open FreeAIWiper, choose Images and drop in the file. Processing happens locally in your browser.
- Choose the cleanup categories. Remove the supported AI metadata. Select private-metadata cleanup separately if you also want supported ordinary comments and private fields removed.
- Review and download. FreeAIWiper reinspects the rebuilt output before download. Open that downloaded copy and use it for sharing, not the original export.
For PNGs, AI-only cleanup removes a selected text chunk as a whole, not individual words inside it. Unselected ordinary comments remain. The cleaner preserves the encoded image data without recompressing the picture. See the PNG coverage and inspection limits for large or unusual exports.
Stop embedding it in future exports
ComfyUI also documents python main.py --disable-metadata for manual launches. In Desktop, its documented control is Settings > Server-Config > Disable saving prompt metadata in files. This changes future saves, not PNGs already on your drive.
Keep a reproducible working copy. Then inspect the sharing copy so you know which supported information goes out with the image.