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How to extract workflow metadata from a ComfyUI image
Extract the JSON that is actually in the file.
By ConvertPass. Last reviewed 16 August 2026.
Sequence
1. Open the PNG chunk inspector. Confirm tEXt keywords prompt and/or workflow.
2. Open the ComfyUI workflow extractor and download the JSON.
3. Pretty-print with the workflow JSON formatter if you need to read it.
4. Import in ComfyUI. Missing custom nodes are a ComfyUI problem, not a ConvertPass parse problem.
What we tested
A synthetic prompt JSON object inside a tEXt chunk was parsed and pretty-printed. Malformed JSON in a chunk produced a parse error plus the raw string. The extractor did not replace it with a template graph.
Limitations
Some forks use different keywords. They will show up as unrecognised PNG text until a profile is tested and named.
Related tools
- ComfyUI workflow extractor
Pull ComfyUI workflow JSON out of a PNG when the chunks are still there.
- Workflow JSON formatter
Check workflow JSON is parseable before you share or import it.
- PNG chunk inspector
See every PNG chunk, including the ones that hide prompts.
Related guides
Related formats
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