Text Diff

Compare two text blocks line by line using the LCS algorithm. Supports ignoring whitespace and case. Free, private, and 100% client-side.

param.ignoreWhitespaceIgnore case (i)

Input

Output

Local only

Recent history

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How to use

Paste the original text into the input box.
Add a separator line containing only ---.
Paste the modified text below the separator.
Toggle ignore whitespace or ignore case if needed, then read the diff.

Frequently asked questions

How do I provide two texts to compare?: Enter the original text, then a line containing only ---, then the modified text. The tool computes a line-level diff between the two blocks.
What do the prefix symbols mean?: Lines prefixed with + are added in the second text, - are removed from the first text, and a space prefix means the line is unchanged.

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