Text Diff Checker
Compare two small blocks of text line by line and see additions and removals.
Free browser tool
No Matrix computer needed
✓ No account or card
✓ Use the result right away
✓ Task-specific limits below
Workspace
Use text diff checker
Runs in this browser tab
Result
How to use it
Separate the old and new text with a line containing three hyphens to produce a line diff.
Try this example
first line old line --- first line new line
What to check
This is a line comparison, not a semantic review or merge-conflict resolver.
Review the result before using it in a published page, application, or agent configuration.
Quick answers
Frequently asked questions
How do I separate the two versions in Text Diff?
Put three hyphens on their own line between the old and new blocks. The result marks added and removed lines.
Does Text Diff understand meaning or code moves?
No. It compares lines rather than intent, so moved lines may appear as a removal and addition. Review the source when accuracy matters.
Keep exploring
Related free tools
Need this work to keep going?
Matrix gives agents a private cloud computer for files, connected tools, and work that continues after you close your laptop. The browser tool above is free; a Matrix computer requires a paid plan.