Free OnlineText Tools
Text Diff Checker
Compare two texts and highlight differences. Find additions, deletions, and changes between text versions easily.
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Key Features — Text Diff Checker
Side-by-side and inline diff views
Color-coded additions, deletions, and changes
Line-by-line and character-level comparison
Ignore whitespace option
Summary of total changes
Why Use This Tool — Text Diff Checker
Free Online Text diffCompare text — for EveryoneFast & Easy Text comparisonDiff checker — 100% FreeFree Online Find differences
Privacy First
All processing happens in your browser. Your data never leaves your device.
Lightning Fast
Get instant results with zero wait time. No server delays, no loading screens.
Works Everywhere
Use on any device — desktop, tablet, or phone. No downloads or plugins needed.
Frequently Asked Questions — Text Diff Checker
How does the diff checker identify changes?
The tool uses a longest common subsequence algorithm to find the minimal set of changes between two texts. Additions are highlighted in green, deletions in red, and modified lines show both the old and new versions so you can see exactly what changed.
Can I ignore whitespace differences?
Yes. Enable the "Ignore whitespace" option and the tool will not flag differences caused by extra spaces, tabs, or trailing whitespace. This is useful when comparing code that may have different formatting but identical logic.
Is this suitable for comparing code files?
Yes. The diff checker works well with source code, configuration files, and structured text. It provides line numbers and syntax-aware highlighting to help developers review changes similar to a Git diff view.