Text Diff Checker
Compare two texts side by side and highlight additions and deletions.
How it works
Paste two versions of text into the left and right panels. The diff checker instantly highlights additions in green and deletions in red, making it easy to spot every change between the two versions.
Why use this tool?
Writers use it to compare draft revisions, developers use it to review code changes, and legal teams use it to compare contract versions. The fastest free online text comparison tool.
Frequently Asked Questions
What does a diff tool do?
A diff (difference) tool compares two text inputs side by side and highlights every addition, deletion, and modification between them, making it easy to see exactly what changed.
Is this useful for comparing code?
Yes. Paste two versions of a function, config file, or JSON object to see which lines changed. For large codebases, use Git's built-in diff instead.
Can it compare entire documents?
Yes. Paste full documents — no length limit is imposed by the tool. Processing is done entirely in your browser.
Is this free?
Yes, completely free and private. Your text never leaves your browser.
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