Text Diff Checker

Paste old and new text versions to instantly see what was added, removed, or modified.

Report
Live compare: updates as you type
Added Removed Changed Unchanged
Original Text (Old Version)
Updated Text (New Version)
Enter two text blocks to start comparing.
1
Paste both texts
Put the older version on the left and the newer version on the right—type or paste.
2
Read the highlights
The diff updates automatically; you do not need a separate “compare” button.
3
Swap or clear
Use “swap sides” to flip columns, or “clear” to start over quickly.
When is this tool useful?
Reviewing documents between versions, previewing code edits before a formal review, or checking contract updates.
What do the colors mean?
Green marks added lines, red marks removed lines; when a line is edited, orange/yellow highlights show character-level changes.
Do spaces and line breaks matter?
Yes. Every character is compared, including spaces, tabs, and newlines. Normalize text in your editor first if you want to ignore formatting-only differences.
Will very large text slow things down?
Very long inputs take more time in the browser. Split the text into smaller chunks or trim unrelated sections first.
What does “swap sides” do?
It swaps the left and right panels so you can reverse the comparison direction without copying again.
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