Does any of this touch a server?

No. Files, strings and generated images stay in the browser.

Can I use the result commercially?

The files are yours: they are generated locally from your own content.

Utilities

See two images side by side and highlight the pixels that differ.

Drag files here, paste from the clipboard or choose them from your device.

Choose images

No image selected yet.

Load the first image and then the second one to compare them.

Small local tools built on the same canvas engine: Base64, generated images, comparison and contact sheets.

Does any of this touch a server?: No. Files, strings and generated images stay in the browser.
Can I use the result commercially?: The files are yours: they are generated locally from your own content.