Free · no signup · browser-local
AI PNG Metadata Viewer for ComfyUI and Stable Diffusion
Inspect embedded PNG text, Stable Diffusion parameters and ComfyUI prompt or workflow fields locally. Preview the image and export metadata that is actually present.
Local PNG inspection · no uploads, model calls or saved inputs
Inspect a PNG
Choose or drop up to 10 files. Files are checked one at a time.
50 MiB total · each file: 20 MiB, 256 chunks, 1 MiB combined text metadata after decompression · PNG onlyThe sample is a real 64 × 64 gradient PNG with synthetic Automatic1111 and ComfyUI fields. It demonstrates metadata reading; the pixels were generated locally without AI.
Ready for a PNG. Nothing is sent to a server.
Your metadata will appear here
Read Automatic1111 parameters, ComfyUI prompt/workflow JSON and other PNG text fields. Start with the downloadable sample if you do not have a PNG handy.
Getting started
Choose or drop up to 10 original PNGs (50 MiB total), inspect progress and per-file errors, then select a file. Select a text field and copy or download its original value, or export every field as a JSON/TXT report. A real downloadable sample PNG and indexed batch ZIP/JSON exports are included.
Before you use the result
PNG only: up to 20 MiB, 256 chunks and 1 MiB combined text after decompression. Compressed metadata requires browser DecompressionStream. No prompt inference from pixels, workflow execution or authenticity detection. Metadata can be absent, edited or stripped; EXIF/ICC chunks are reported without decoding.
Try an example
Load the synthetic 64 × 64 sample, select its workflow field and download the original JSON. Its large seed integer remains unchanged. Try a PNG with no text metadata to see the explicit missing-metadata result.
How it works
Checks the PNG signature, critical chunk order, dimensions, bounds and every chunk CRC, then reads ISO-8859-1 tEXt/zTXt and strict UTF-8 iTXt with bounded zlib streaming. Exact parameters, prompt and workflow names label optional embedded fields. Duplicate keys stay ordered; raw JSON is never parsed and reserialized for export. Preview is disabled for animation or dimensions above 16 million pixels / 16,384 per side.
Frequently asked questions
Read embedded PNG text locally, inspect Automatic1111 parameters and ComfyUI prompt or workflow JSON, and export the original fields.
How do I use AI PNG Metadata Viewer?
Choose or drop up to 10 original PNGs (50 MiB total), inspect progress and per-file errors, then select a file. Select a text field and copy or download its original value, or export every field as a JSON/TXT report. A real downloadable sample PNG and indexed batch ZIP/JSON exports are included.
Does this tool upload my data?
Inputs and files are processed in your browser. Page-view analytics do not contain your tool input.
What should I check before using the result?
PNG only: up to 20 MiB, 256 chunks and 1 MiB combined text after decompression. Compressed metadata requires browser DecompressionStream. No prompt inference from pixels, workflow execution or authenticity detection. Metadata can be absent, edited or stripped; EXIF/ICC chunks are reported without decoding.