Text diff

Compare two text files online, word by word

Built for writers and editors working through drafts. Paste both versions, choose word or character granularity, and read the changes like a marked-up manuscript.

Original draft
Revised draft

Everything is compared in your browser. No text or file ever leaves this device.

Paste your original text on the left, the revised version on the right, then press Compare.

Draft comparison

See exactly which sentences an editor touched between versions, without re-reading the whole document.

Contract redlines

Paste two clause sets and read the additions and strikeouts the way a legal reviewer would mark them on paper.

Nothing is uploaded

The diff runs in your browser with JavaScript. Confidential drafts never touch a server.

Frequently asked questions

How do I compare two text files online?
Paste the original draft on the left and the revised draft on the right, or upload two .txt or .md files, then press Compare. Redline highlights every insertion in green and every deletion in red.
Can I compare two Word documents?
Not as .docx directly. Copy the text out of Word and paste it into both panes — the comparison is identical, and nothing is uploaded anywhere.
Does it show word-level changes?
Yes. Switch the granularity to Word to see exactly which words changed inside a sentence, or Character for typo-level precision.
Is there a length limit?
Pasted text has no hard limit; uploaded files are capped at 2 MB so the browser stays responsive.