Diff CheckerCompare two files or code snippets line by line with added and removed lines highlighted.
Text Compare
See exactly what changed between two drafts. Words that were removed are struck through, new words are highlighted, and a summary counts the changes. For line-by-line code comparison, use the Diff Checker.
Differences
Runs entirely in your browser. Your input and files are not uploaded to any server.
How to use
- Paste the original text on the first box and the changed version in the second.
- Press Compare.
- Review the highlighted result. Removed words are marked in red and struck through; added words are marked in green.
Examples
Edited paragraph
“The meeting is on Monday” vs “The meeting is on Tuesday morning” shows “Monday” removed and “Tuesday morning” added.
Privacy
Runs entirely in your browser. Your input and files are not uploaded to any server. See the privacy policy for what is stored in your browser (favorites and history only). Privacy policy
Check it yourself: open your browser’s developer tools, select the Network tab and use the tool. Your file never appears in an upload request. Once this page is saved for offline use, you can also disconnect from the internet and keep working. Ads and anonymous visit statistics, when enabled, make their own requests, but they never receive your files or text.
Frequently asked questions
How does the comparison work?
Both texts are split into words and spaces, then a longest-common-subsequence algorithm finds the smallest set of insertions and deletions.
Is there a size limit?
Comparisons up to about 20,000 words per side run comfortably. Larger texts are refused so the page does not freeze.
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