PNG Metadata Viewer

Use PNG Metadata Viewer to inspect metadata stored in PNG files without uploading the image. PNG files do not use the same EXIF-first pattern as many JPEG photos, but they can still carry text chunks, software names, copyright notes, author values, timestamps, ICC profiles, and sometimes embedded EXIF or XMP data.

PNG is common for screenshots, interface images, design exports, diagrams, transparent graphics, and documentation assets. Those files may look simple, but exported metadata can still reveal which application created the image, who exported it, or what workflow produced it.

When this viewer helps

Use PNG Metadata Viewer before publishing screenshots, UI mockups, app diagrams, design-system assets, documentation images, transparent logos, or downloadable graphics. PNG files are often treated as harmless because they are not camera originals, but screenshots and design exports can still carry software names, author fields, comments, timestamps, copyright notes, and color profiles.

For teams, PNG metadata can answer practical production questions too. A software field may explain which editor or screenshot utility created a file. A timestamp can help trace an outdated diagram. ICC, gAMA, sRGB, and cHRM style data can help explain why a PNG renders differently across tools. The goal is to keep useful technical context when it is needed and remove fields that reveal people, machines, or internal workflows when the image is public.

Field notes

The PNG Metadata Viewer focuses on tEXt, iTXt, zTXt, eXIf, and iCCP chunks when they are present. Text chunks can store keys such as Author, Software, Copyright, Description, Creation Time, Source, Disclaimer, or Comment. International text chunks can store UTF-8 values, while compressed text chunks can hide long notes that are not visible in a normal image preview. ICC profile data is usually display-related and may be preserved during cleanup when removing it could affect color.

Because PNG metadata is chunk-based, the raw metadata view is especially useful. It shows which chunk group was detected and which fields were readable, so technical users can distinguish a clean file from a file that simply does not use familiar field names.

Practical privacy workflow

First inspect the final PNG that will be uploaded, attached, or committed to a repository. Then separate visible privacy issues from hidden metadata issues. Metadata cleanup can remove supported chunks, but it cannot hide a private email address, browser tab, API key, customer name, or internal URL that is visible in the screenshot pixels.

When a PNG is part of a build pipeline, test the output after the optimizer has run. Some optimizers strip text chunks; others preserve color and copyright fields; design tools may add new values during export. If cleanup is available, download the cleaned PNG and inspect that new file again before publishing. This gives you evidence that the served asset, not only the source file, was checked.

Before you inspect

Inspect the final PNG you plan to publish. A design tool export, screenshot utility, or optimization pipeline can add or remove chunks at different stages. If you are checking privacy before sharing a screenshot, make sure the visible pixels are safe too; metadata cleanup cannot remove private text shown inside the image itself.

What the result can and cannot prove

A clean result means the browser-local parser did not find readable supported PNG metadata chunks. It does not mean the image is free of sensitive visible content, and it does not validate that every proprietary ancillary chunk has no meaning. It also does not guarantee identical color after third-party processing, because CDNs and image optimizers may rewrite color or metadata chunks later.

The local processing model is useful for confidential screenshots because the file is analyzed in your browser. If you open an external map, CDN, or unrelated preview service outside this tool, those services have their own privacy behavior.

Troubleshooting

If the tool finds no PNG text metadata, the file may already be stripped or may only contain pixel data and display-critical chunks. If cleanup is available, the cleaned PNG keeps the format and removes supported metadata chunks locally in the browser. If color changes would be a concern, keep a copy of the original and compare the cleaned file visually before publishing. If a PNG fails to parse, confirm that the file extension and MIME type match a real PNG, then try a current desktop browser before assuming the asset is corrupt.