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Text difference checker

Compare two texts line by line with added, removed and unchanged markers.

Runs in your browser · No file or text uploads

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ABOUT THIS TOOL

What Text difference checker helps you do

Review edits between document drafts or configuration files and save a readable comparison.

How to use it

Enter the original in A and the revision in B.
Run the comparison.
Review + added, − removed and unchanged lines.

Input and output example

INPUT

A: Apple
Pear / B: Apple
Grape

OUTPUT

  Apple
- Pear
+ Grape

Supported formats and limits

Maximum per input: 20,000 characters and 1,000 lines.
Comparison is line based; individual characters inside a changed line are not highlighted.

How the result is calculated

CRLF and CR are normalized to LF. Whitespace and case differences count as changes. The diff library compares lines; a missing final newline can also produce a difference.

Frequently asked questions

Are the texts sent to a server?

No. Both inputs are compared in the browser.

Can I read the result without relying on color?

Yes. Each block has an added, removed or unchanged text label as well as a symbol.