Compare Two Texts and Spot Every Change
This free text diff checker compares two blocks of text and highlights exactly what was added, removed or left unchanged, with green for additions and red strikethrough for removals. Choose whether to compare word by word, line by line, or character by character, and optionally ignore case or extra whitespace so only meaningful differences are shown.
Use it to review edits to an article, compare two versions of code or config, check changes between contract drafts, or spot differences between two lists. Everything runs locally in your browser using JavaScript, so neither text is ever uploaded anywhere.
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Frequently Asked Questions
Is my text uploaded to a server?
No. The comparison runs entirely in your browser using JavaScript, and neither text is ever sent anywhere.
What is the difference between word, line and character diff?
Line diff compares whole lines, word diff compares individual words, and character diff compares every single character. Word diff is usually the most readable for prose.
Can I ignore case or whitespace differences?
Yes. Turn on Ignore Case or Ignore Whitespace before comparing to skip differences that are only about capitalization or spacing.
Is there a text length limit?
Very long texts, especially with character-level diff, can be slow to compare in the browser, so this tool works best under about 20,000 characters per side.
Is this free to use?
Yes, completely free with no sign-up and no limit, since all processing happens on your own device.