Compare two texts with a free online diff checker

Compare two versions of text, code or configuration and inspect line-by-line differences. Paste or open your inputs, review the changes and keep the comparison in your browser.

Compare text, code and configuration
View line-by-line differences
Process comparisons locally without login

Paste an original and revised version, then compare them side by side. Added and removed lines are marked so you can review a draft, configuration or code snippet before using the revision.

How to compare two text files

Paste the original text on the left and the revised text on the right, or open the local text files.
Run the comparison and inspect the highlighted additions, deletions and changed lines.
Review changes in context before copying the revised text back into your own document or code editor.

This compares text differences; it does not judge whether a code change is correct or whether two documents have the same meaning.

Popular ways to use Text Compare / Diff

Compare a draft with a revised version to see changed lines.
Check differences between configuration files before copying an update.

How processing and privacy work

Processing runs in your browser. The page may download scripts, fonts or processing engines to run the tool; these downloads are separate from uploading your input files.