Remove Flux and Fooocus Metadata from Images
Flux (by Black Forest Labs) and Fooocus are among the most popular open-source AI image generators. Both embed generation parameters into output files. StripShot removes all metadata traces in seconds, with zero quality loss.
What Flux embeds in your images
Flux is a family of models (Flux.1 Dev, Flux.1 Schnell, Flux.1 Pro) from Black Forest Labs. The metadata embedded depends on which interface you use to run Flux. Here is what each component stores.
PNG info chunks
When running Flux through ComfyUI, the entire workflow graph is stored in PNG tEXt chunks. This includes every node, every connection, and every parameter. The prompt, model path, sampler, scheduler, guidance value, and seed are all embedded.
ComfyUI stores this data in two chunks: prompt (the API-format workflow) and workflow (the full node graph JSON). Both can be 50-200KB of metadata per image.
EXIF comment fields
Some Flux interfaces write generation parameters to EXIF UserComment or ImageDescription fields. This includes the prompt text, model variant (Dev, Schnell, Pro), guidance scale, and step count.
When saving as JPEG, Flux parameters are typically stored in EXIF since JPEG does not support PNG tEXt chunks.
Generation parameters
Flux uses different parameters than Stable Diffusion. Key values include: guidance scale (typically 3.5-7.0 for Flux Dev), step count, sampler name, scheduler type, seed, image dimensions, and the specific Flux model variant used. All of these are stored in the metadata.
What Fooocus embeds in your images
Fooocus is a Stable Diffusion interface designed for simplicity. Despite its minimal UI, it still embeds detailed generation data.
Fooocus metadata format
Fooocus stores generation parameters in PNG tEXt chunks using a custom format. The metadata includes: prompt, negative prompt, style selections, performance preset (Speed, Quality, Extreme Speed), aspect ratio, seed, and the base model plus any applied LoRA models.
Fooocus also logs which style presets were applied (Fooocus V2, Cinematic, etc.) and any inpainting or upscaling steps. This data is readable by anyone who knows the Fooocus metadata format.
Fooocus log files
Fooocus also creates detailed log files on disk, but these do not travel with the image. The embedded metadata in the PNG file itself is the concern when sharing images online. StripShot handles this metadata.
How StripShot removes Flux and Fooocus metadata
- PNG files: Removes all tEXt, iTXt, and zTXt chunks. This strips ComfyUI workflow JSON, Fooocus parameters, and any custom metadata.
- JPEG files: Strips EXIF APP1 markers containing UserComment and ImageDescription fields with generation data.
- XMP data: Removes any XMP metadata that may contain tool references or generation information.
- WebP files: Strips EXIF and XMP segments from WebP container metadata.
- All formats: Binary-level operation. No re-encoding, no canvas processing, zero quality loss.
Everything happens in your browser. Your images never touch a server.
Flux on hosted platforms
Flux is available through hosted services like Replicate, fal.ai, Together AI, and various Discord bots. Each platform may add its own metadata on top of the model output. Some platforms strip generation data before delivery. Others pass it through.
If you run Flux locally through ComfyUI, Automatic1111 (with Flux support), or the Flux CLI, metadata is almost always embedded. StripShot removes it regardless of the source interface.
Flux Pro (the commercial API) may include additional API-specific metadata in the response. StripShot strips all non-structural metadata from the image file.
Why Flux and Fooocus metadata matters
Unlike DALL-E and Firefly, Flux and Fooocus do not embed C2PA Content Credentials. Social platforms are less likely to auto-label these images. But the generation parameters expose your entire creative process.
Anyone who downloads your Flux image can extract the complete ComfyUI workflow, including custom nodes, LoRA models, and IP-Adapter references. For artists and creators building workflows, this is intellectual property that should be protected.
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