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Text Diff Checker
Compare two blocks of text side by side and highlight every difference line by line with color-coded additions, deletions, and changes. Ideal for proofreading, reviewing document edits, comparing code versions, and spotting subtle content changes. Works entirely in your browser.
Updated June 2026
- 1Paste your original text
- 2Paste the text to compare
- 3Review the highlighted differences
How to use Text Diff Checker
- 1
Paste your original text
Enter the first version of the text in the left panel.
- 2
Paste the text to compare
Enter the second version in the right panel.
- 3
Review the highlighted differences
Added, removed, and changed lines are highlighted automatically.
Frequently asked questions
Everything you need to know about text diff checker.
It compares texts line by line. Lines only in the first text appear in red (removed), lines only in the second appear in green (added), and unchanged lines are shown in neutral color.
Yes. Any plain text — including code in Python, JavaScript, HTML, SQL, or any language — can be compared line by line.
No. You can compare documents of any length, from a few words to thousands of lines.
No. The diff algorithm runs entirely in your browser. Your text never leaves your device.
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