Diff Checker

Compare two text blocks and see the differences

OriginalLeft side

ModifiedRight side

Diff Result

Enter text on both sides to see the diff

Related tools

JSON Diff

Compare

Text Diff

Compare

JSON Formatter

Formatter

Regex Tester

Validator

What is a diff checker?

A diff checker compares two versions of text and highlights the differences between them — additions, deletions, and modifications. It's essential for code review, document comparison, and change tracking. This tool runs entirely in your browser using a line-by-line diff algorithm.