Diff Checker - Compare Two Texts
Quick Tips
- • Paste original text on the left, modified on the right
- • Green highlights additions, red shows deletions
- • Useful for comparing code changes or document revisions
Compare two texts and highlight the differences.
Additions
Deletions
Unchanged
Examples
Text A: Hello World Text B: Hello Universe
Changed: "World" → "Universe"
Text A: Line 1 Line 2 Text B: Line 1 Line 3 Line 2
Added: "Line 3"
Why Use This Tool?
What problems does this solve?
Comparing two versions of text manually is exhausting and easy to miss subtle changes. Whether reviewing document revisions, code changes, or contract modifications, you need clear visual highlighting of differences.
Common use cases:
- Reviewing code changes before committing or during code reviews
- Comparing contract versions to identify modifications
- Checking document revisions to see what editors changed
Who benefits from this tool?
Developers reviewing code changes. Legal professionals comparing contract versions. Editors tracking document revisions. Students comparing essay drafts. Anyone needing to spot differences quickly.
Privacy first: All processing happens in your browser. Your confidential documents and code never leave your device.
Frequently Asked Questions
We use a variant of the Myers diff algorithm, the same algorithm used by Git and many other diff tools. It finds the minimal set of changes between two texts.
Yes! The diff checker works great for any text including code. Use line-by-line mode for the best code comparison experience.
The tool handles texts up to several megabytes. Very large files may take longer to process but will work. Processing happens in your browser.
Yes, you can copy the results or export them. The highlighted differences make it easy to share comparison results with others.
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