PNG Info Viewer & Editor

PNG Info Viewer & Editor is a browser-based online tool for reading, editing and cleaning up the text data embedded in PNG images. Whether you want to recover the generation parameters written by AI art apps or add custom descriptions to a PNG, everything happens locally and losslessly — the pixel data is never touched.

Key Features

• Complete text chunk viewer: automatically parses all text chunks in a PNG, supporting tEXt, zTXt and iTXt formats, with one-click copy for each entry.
• Smart AI parameter parsing: recognizes parameters, sd-metadata, prompt and workflow chunks written by Stable Diffusion and similar AI art tools, formatting the prompt, negative prompt and sampling settings (Steps, Sampler, CFG, Seed, Size) for easy reading.
• Full editing: modify existing text chunks, delete entries you no longer need, or add new custom keyword chunks.
• Lossless saving: edits only reorganize the chunk structure on your device without re-encoding image data, so quality stays exactly the same.
• One-click metadata removal: strip all text information from a PNG and download the cleaned image — handy for protecting privacy before sharing.
• Batch processing: upload up to 30 PNGs at once, batch-delete or batch-write chunks with a chosen keyword, then download everything as a single ZIP.

Use Cases

• AI art fans: recover prompts, negative prompts and sampling parameters from images generated by Stable Diffusion and other tools.
• Creators and designers: add copyright, author and description metadata to PNG images.
• Privacy protection: remove potentially sensitive embedded data before sharing PNG files.
• Developers and testers: inspect text chunk content inside PNG files and verify image metadata.

How to Use

1. Click or drag PNG files onto the upload area; multiple files are supported.
2. Pick an image from the thumbnail grid to view its text chunks — AI parameters are shown in a structured card.
3. Edit or delete chunks as needed, or add a new chunk by entering a keyword and value.
4. Hit "Save & download PNG" for a lossless copy, or use the batch panel to apply changes to many files and download a ZIP.

FAQ

Q: Do I need to upload my images to a server?

A: No. Everything runs locally in your browser, and your images are never uploaded anywhere.

Q: Will the saved PNG lose image quality?

A: No. Only text chunk data is modified and the checksum is recalculated — a fully lossless edit with zero quality loss.

Q: Which formats are supported?

A: PNG only. Other formats such as JPEG, WebP or GIF are detected and flagged, so convert them to PNG first.

Q: How do I view the generation parameters of an AI image?

A: Just upload the PNG — parameters, sd-metadata and similar chunks are auto-detected and shown as structured prompt, negative prompt and settings, with one-click copy.

Q: Will the image still display normally after removing text chunks?

A: Yes. These chunks are auxiliary metadata; removing them does not affect how the image renders.