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How to extract workflow metadata from a ComfyUI image
Extract the JSON that is actually in the file.
By ConvertPass testing desk. 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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