📝 Text Tools
Diff Checker
Compare two pieces of text side by side. Added and removed lines are highlighted. Useful for code reviews, content comparison and change tracking.
Enter text in both panels to compare…
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Free Online Diff Checker — Compare Two Texts Side by Side
Our free diff checker compares two text blocks and highlights additions (green) and deletions (red) line by line — like Git diff. Perfect for comparing document versions, code changes and legal text revisions.
🔴 Deletions Highlighted
Removed lines shown in red.
🟢 Additions Highlighted
Added lines shown in green.
⚡ Instant Compare
Diff appears as you type in either box.
🔒 Private
Text never leaves your browser.
How to Use — Step by Step
1
Paste original text
Enter your original "before" text in the left panel.
2
Paste modified text
Enter the modified "after" text in the right panel.
3
Read the diff
Green = added lines. Red = removed lines. Grey = unchanged.
4
Clear and compare again
Use Clear to reset for a new comparison.
Frequently Asked Questions
What is a diff?
Short for "difference" — shows exactly what changed between two versions of a file or text. Fundamental to version control systems like Git.
Can I compare code?
Yes — works on any plain text including source code in any programming language.
Line-by-line or word-by-word?
Line-by-line comparison — the standard method used by Git diff and code review tools.
Can I compare very large texts?
Yes — no size limit. Comparing thousands of lines may be slightly slower in older browsers.
Diff checker vs plagiarism checker?
A diff checker compares two specific texts you provide. A plagiarism checker searches the internet for similar content. Different tools for different purposes.
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