Add Comment to PNG File
Write text annotations directly into the system comment metadata. Runs entirely in your browser, so your data never leaves your device.
Drop a file here, or click to browse
Files never leave your device
Output
The result appears here as you type.
How to use Add Comment to PNG File
- 1. Upload the PNG to annotate. Add the PNG that should carry the note. The file's pixels are left untouched; only a text chunk is added to the file's metadata section.
- 2. Enter a keyword and comment text. Fill in Keyword to label the chunk, such as Author or Description, then write the note itself in Comment text. Standard keywords are recognized by most image viewers and editors.
- 3. Download the annotated PNG. Download the file once the comment is embedded. Any tool that reads PNG tEXt chunks, including many image viewers and command-line utilities, can retrieve the note later.
When to use Add Comment to PNG File
Add Comment to PNG File writes a text note directly into a PNG's tEXt metadata chunk without changing a single visible pixel. It is a way to attach context, like authorship or a version note, to an image file itself rather than to a separate document.
- Recording who created an asset. A design team shares exported PNGs across tools and wants the original author's name to travel with the file. An Author keyword comment keeps that information attached even after the file is copied.
- Noting the source of a screenshot. A QA engineer archives bug screenshots and wants each one tagged with the build number it came from. A comment chunk keeps that detail inside the file instead of a separate spreadsheet.
- Leaving a license note on exported graphics. A stock graphic exported for reuse needs a quick copyright or license line attached. Embedding it as a comment means the note survives even if the filename gets changed.
Examples
Embed an author note
Input
photo.png
Output
photo.png with a tEXt comment chunk
About the Add Comment to PNG File tool
Add Comment to PNG File runs as plain JavaScript in your browser tab, with no server behind it. Write text annotations directly into the system comment metadata. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's PNG Tools section, 108 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with 2 settings, including Keyword and Comment text, and the result refreshes the moment you change one. The finished file is put together in browser memory and saved with the Download button, so it never touches a server on the way to your disk. A worked example further down the page shows exactly what the tool produces for a real input.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Is Add Comment to PNG File free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Are my files uploaded to a server?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
Which files does Add Comment to PNG File accept?
It accepts PNG images. There is no file size cap imposed by a server; very large files are limited only by your device's memory.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I save the output?
Click the Download button once the result is ready. The file is built in your browser's memory and handed straight to your downloads folder, without passing through a server.