Diff Checker: Compare Text and Code Online

Compare two files or snippets side by side and export patch files.

2026-01-066 min

Use the tool alongside this guide for hands-on practice.

How diff works

Diff algorithms find the minimal changes between two texts.

Use patch files to share changes across environments.

This tool is for text only. Binary files are not supported.

January 6, 20266 min

Learn how to build and debug regular expressions with live highlights, flags, and real-world examples.

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Write Markdown with live preview and export clean HTML in seconds.

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