Text Diff
Compare two texts and highlight differences line by line
Original Text
Modified Text
Diff Result
Enter two texts and click Compare to see the differences.
Usage Examples
Document Comparison
Compare two versions of a document to quickly spot every change, addition and deletion between them.
Code Review
Compare code snippets to review changes between different versions of your source code.
Version Tracking
Track changes in changelogs, release notes or configuration files across versions.
Features
Side-by-Side Input
Enter original and modified texts in separate panels for easy comparison
Color-Coded Output
Added lines in green, removed lines in red, unchanged lines in normal style
Flexible Options
Ignore case, whitespace or trim lines for more flexible comparison
Privacy First
All processing happens locally in your browser, no data sent to servers
How to Use?
Enter Texts
Paste or type the original text on the left and the modified text on the right.
Set Options & Compare
Optionally enable ignore case, ignore whitespace or trim lines, then click Compare.
Review & Copy
Review the color-coded diff output showing all changes. Copy the result if needed.
Frequently Asked Questions
What Is Text Diff?
Ever need to figure out exactly what changed between two versions of a document, config file, or code snippet? That is what this tool does. Paste the original on the left, the modified version on the right, and get a clear color-coded breakdown of every addition, deletion, and unchanged line.
How It Works Under the Hood
The tool uses a Longest Common Subsequence algorithm -- the same approach used by git diff and other professional diff tools. It compares your texts line by line and categorizes each one as added (green), removed (red), or unchanged. The result is a clean, readable output you can scan in seconds.
Real Use Cases
Developers use it to review code changes before committing. Technical writers compare document revisions. System admins diff configuration files after updates. Editors track changes in articles. If you have ever struggled to spot the difference between two blocks of text, this tool saves you the headache.
Flexible Comparison Options
Sometimes you only care about content, not formatting. The Ignore Case option treats uppercase and lowercase as identical. Ignore Whitespace normalizes spacing differences. Trim Lines cleans up leading and trailing spaces. Mix and match these options to get the comparison that matters to you.
Copy and Move On
Once you have your diff, copy it with one click. The Swap button lets you quickly flip the original and modified texts. Everything runs instantly in your browser -- no uploads, no waiting, no accounts.
Privacy First
Your texts never leave your browser. No data is uploaded, stored, or logged. Compare sensitive documents, proprietary code, or private notes without any privacy concerns.