What FLUX writes into the files it gives you, what survives sharing, and how to remove it without touching quality.
Drop a file below to see what is actually in it. Everything is parsed in your browser and nothing is uploaded.
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FLUX models from Black Forest Labs are run through many different front ends, and the front end decides what lands in your file, not the model.
The model itself writes nothing. What you find depends on the interface: ComfyUI embeds the full workflow JSON in the PNG, a hosted playground may add its own XMP block, and a raw API call typically returns a bare file. Because of that, generalising is pointless and reading the actual file is the only reliable method.
Whatever the front end added, rewriting the file removes it. Run your export through the checker above first so you know what you are dealing with, especially if you used ComfyUI, where the embedded workflow can be surprisingly revealing.
Remove every metadata block without re-encoding. Runs in your browser, nothing is uploaded.