Free text, diff & writing utilities

These cover the everyday editing jobs that are annoying without a proper tool: spotting what changed between two versions of a document, diffing JSON structurally rather than line by line, checking a word count against a hard limit, or converting case across a block of text.

They pair naturally with the developer tools — format a JSON file first, then compare it against another — and everything runs in your browser, so unpublished drafts and config files never leave your device.