Text Diff Checker
Compare two text blocks side by side. Highlights added, removed, and changed lines.
Compare Text Differences Instantly
Whether you're reviewing a contract revision, checking code changes between commits, or comparing two versions of an article, this diff tool highlights exactly what changed — line by line, with color-coded additions, deletions, and modifications.
How to Use
- Paste the original text in the left panel.
- Paste the modified text in the right panel.
- Click Compare — added lines appear in green, removed lines in red, and modified lines in amber.
Use Cases
- Code review — compare two versions of a function or config file
- Document revision — see what changed between drafts of a contract or proposal
- Data comparison — diff two CSV exports or log files
- Plagiarism check — compare student submissions against source material
Related: Word Counter, Case Converter, JSON Formatter.
FAQ
Is this tool free to use?
Yes. The tool is free to use in your browser and does not require an account.
Do I need to install anything?
No. The workflow runs in a normal modern browser, so you can use it on desktop or mobile without installing extra software.
Is my text uploaded to a server?
No. All text processing happens locally in your browser. Your content never leaves your device.
Is there a character or word limit?
There is no hard limit, but very large inputs may be slower due to browser memory. Most common use cases process instantly.
Can I use this for business or client work?
Yes, but you should still verify important results and keep source files when the work affects billing, legal, or operational decisions.
Why does the result look different from another tool?
Different tools may use different counting rules, formatting defaults, or parsing behavior. Check the options and compare with your target platform requirements.