Diffed.
one job: compare your text
About this tool
Diffed. compares two blocks of text and highlights exactly what changed, lines added, lines removed, and the specific words that differ within lines that were edited rather than replaced entirely. Paste the original on the left and the revised version on the right, then click Compare.
It's built for the moment you need to know what actually changed between two drafts, two versions of a document, a before-and-after edit, or a stretch of code, without reading both versions line by line yourself.
Frequently asked questions
How do I compare two texts online?
Paste the original text on the left, the edited version on the right, and click Compare. Lines and words that changed are highlighted immediately.
Does this show word-by-word differences or just line changes?
Both. Lines that changed are highlighted first, then the specific words that differ within those lines are highlighted individually.
Can I use a text diff tool to compare code?
Yes, it works on any plain text, including code, though it is not syntax-aware, it only compares the text itself.
Is my text uploaded or stored anywhere?
No. The comparison runs entirely in your browser using JavaScript, nothing is sent to a server.