About This Text Difference Checker

This Free Text Difference Checker is a powerful visual diff tool that lets you compare two blocks of text side-by-side. Instantly spot additions, deletions, and modifications without having to read through dense paragraphs manually. Because it runs locally in your browser, your sensitive documents and code are never uploaded to the internet.

Who is it for?

Programmers & Developers: Compare code snippets, JSON files, or configuration files before committing changes to version control.
Lawyers & Paralegals: Review contract revisions and legal documents to ensure no unauthorized clauses were added.
Writers & Editors: See exactly what changes an editor or co-author made to your manuscript or article.

Common Use Cases

Plagiarism Checking: Compare an original source text against a submitted essay to find identical phrasing.
Data Verification: Compare two lists of names, emails, or IDs to spot missing or added entries.
Version Control Recovery: If you accidentally overwrite a file, paste your backup and your current version to see what you lost.

Frequently Asked Questions (FAQ)

Is my text stored anywhere?

No. The text diff algorithm runs entirely in your local browser. Your data is not sent to any external server, ensuring complete confidentiality.

Can I compare code with this tool?

Yes. The tool preserves whitespace and uses a monospace font, making it perfect for comparing code snippets, HTML, JSON, or any formatted text.

What do the colors mean?

Red highlighting on the left side indicates text that has been deleted or modified. Green highlighting on the right side indicates new text that has been added.

Related Developer Tools

Explore our other free utilities:

JSON Viewer & Formatter - Clean, format, and validate your JSON payloads.
Text Cleaner - Strip out weird formatting and fix capitalization issues.
Git Cheat Sheet - Learn how to use the command line for proper version control.

Text Difference Checker

Original Text

Modified Text

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