Text Diff Checker
Free CompareCompare two text blocks and highlight the differences line by line.
Enter two texts to compare
Paste original and modified text above, then click Compare
Comparing texts...
Split View
Unified
Word-Level
Swap
Stats
Private
Everything You Need
Powerful features designed to make your text work easier and faster.
Side-by-Side Diff View
Compare two text blocks in a dual-panel layout with differences highlighted line by line.
Unified Inline Diff
Switch to a single-panel unified view that shows additions and removals in a single stream.
Added Lines Highlighting
New lines are highlighted in green with a + prefix, making additions instantly visible.
Removed Lines Highlighting
Deleted lines are highlighted in red with a - prefix, clearly showing what was cut.
Word-Level Changes
Within changed lines, individual modified words are highlighted for granular change detection.
Case Sensitivity Toggle
Choose whether capitalization differences should be flagged as changes or ignored entirely.
Ignore Whitespace Option
Toggle whitespace-only changes on or off to focus on meaningful content differences.
Diff Statistics
See exact counts of added lines, removed lines, and changed lines at a glance in a summary bar.
Swap Texts Button
Instantly swap the original and modified text panels to reverse the comparison direction.
Line Numbers in Diff
Toggle line numbers on or off in the diff output for precise reference and documentation.
Keyboard Shortcuts
Press Ctrl+Enter to compare, Ctrl+S to swap, and Ctrl+Shift+C to copy the diff result.
100% Private Comparison
All diff processing happens in your browser. Your text never leaves your device — fully secure.
Simple as 1-2-3
No learning curve. Get results in seconds with our intuitive workflow.
Paste Original Text
Enter the first version of your text in the left panel.
Paste Modified Text
Enter the second version in the right panel.
View the Diff
Click compare and see all differences highlighted instantly.
Who Is It For?
Designed for professionals, students, and creators across industries.
Writers & Editors
Compare document revisions to see exactly what changed between versions.
Developers
Compare code snippets, configuration files, or text output differences.
Legal Professionals
Compare contract revisions and track changes between document versions.
Content Reviewers
Spot unauthorized changes or verify edits in reviewed content.
Why Choose This Tool?
Real advantages that save you time and protect your privacy.
Clear Visual Diff
Color-coded highlighting makes added, removed, and changed lines immediately obvious.
Line-by-Line Accuracy
Compares text line by line for precise change detection that's easy to follow.
No Size Limits
Compare short paragraphs or entire documents with equal speed and accuracy.
Free & Private
No cost, no signup, no uploads. Your text stays on your device.
Frequently Asked Questions
Everything you need to know about this tool.
How does the diff algorithm work?
Can I compare code with this tool?
Is there a size limit for comparison?
Does it highlight word-level changes?
100% Private. 100% Free.
This tool runs entirely in your browser. Your text is never uploaded to any server. No signup, no tracking, no hidden costs — forever.