Online Diff Checker
Compare two blocks of text or code to find differences instantly. Free, secure, and fast online diff tool for developers and writers.
100% FreeInstant ComparisonCode & TextPrivate & Secure
Your privacy is our priority: All text comparison happens locally within your browser. We do not store or track the text you compare, and no data is ever uploaded to our servers.
How to Compare Text or Code
Using our Diff Checker is simple and fast. It highlights exactly what was added, removed, or modified between two versions of text:
- 1Paste your original text (or older version of code) into the 'Original Text' panel on the left.
- 2Paste your new text (or modified code) into the 'Modified Text' panel on the right.
- 3Click the 'Compare' button to run the diff algorithm instantly.
- 4Review the output. Additions are highlighted in green, while deletions are highlighted in red.
Who uses a Diff Checker?
A text comparison tool is an essential utility for many different professions:
- Software DevelopersDevelopers use diff tools constantly to review code changes before committing them to a repository (like Git), ensuring no accidental bugs are introduced.
- Editors and WritersWhen a document goes through multiple revisions, writers can compare the rough draft to the final copy to see exactly which sentences were re-written or removed.
- Legal ProfessionalsLawyers compare older and newer versions of contracts to ensure no hidden clauses were added or critical terms modified during negotiations.