Text Diff Checker
Compare two text blocks and see line-by-line differences.
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What is Text Diff Checker?
A text diff tool shows what changed between two versions of content — useful for code, contracts, and copy edits.
How to use
Paste original text on the left.
Paste updated text on the right.
Review highlighted differences.
Benefits
- Line-by-line comparison
- No upload required
- Great for revisions
Frequently Asked Questions
How does the diff highlight changes?
The tool compares two text blocks line by line and highlights lines that were added, removed, or changed between versions.
Does it compare word by word within a line?
Comparison is line-based, not word-level. For intra-line edits, changed lines are marked as a whole.
Can I compare code or log files?
Yes. Paste any plain text — code, configs, contracts, or logs. Line endings are normalized for comparison.
Is this tool free?
Yes. This tool is completely free to use with no sign-up, no limits, and no hidden fees.
Does my data leave my browser?
No. All processing happens entirely in your browser using client-side JavaScript. Your data is never sent to a server or stored anywhere.
Does this tool work on mobile?
Yes. PeasyDo tools work in modern mobile browsers on iOS and Android. For file tools, use a browser that supports file uploads and downloads.
Do I need to install software?
No. Everything runs in your browser — no desktop app, plugin, or account required.
Feedback & report a problem
Found a bug or have a suggestion? Let us know — it helps us improve this tool.
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