Text Diff

Compare texts side-by-side and find differences instantly. Free, private, no limits.

100% Private No Limits Real-time
Enter text to see comparison statistics
Size:
Original
Modified

Enter text in both panels to see the diff
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How It Works

1

Enter Your Texts

Paste or type your original text on the left and modified text on the right. You can also upload files.

2

View Differences

Differences are highlighted in real-time. Green shows additions, red shows deletions.

3

Navigate & Export

Use navigation arrows to jump between changes. Download results as text or HTML.

Key Features

100% Private

All comparison happens in your browser. Your text never leaves your device.

Multiple Views

Switch between side-by-side and inline diff views based on your preference.

Character-Level Diff

See exactly which characters changed within each line, not just entire lines.

Flexible Options

Ignore whitespace, case differences, or blank lines to focus on meaningful changes.

Frequently Asked Questions

Is my text private and secure?
Yes, absolutely. All text comparison happens directly in your browser using JavaScript. Your text is never sent to any server.
What algorithm is used for comparison?
We use a custom implementation of the Longest Common Subsequence (LCS) algorithm, which is the industry standard for text comparison.
What file types can I compare?
You can upload .txt and .md (Markdown) files. The text content is extracted and compared.
Is there a size limit?
There is no hard limit. The tool can handle very large texts, though performance may vary on older devices for extremely large files.

Who Uses Text Diff?

Developers

Compare code changes, review pull requests, and debug differences between versions without external tools.

Writers & Editors

Track document revisions, compare drafts, and see exactly what changed between versions of your content.

Students & Academics

Compare essay drafts, check for accidental plagiarism, and review changes suggested by professors.

Legal & Business

Compare contract versions, track policy changes, and ensure document integrity in professional settings.

About Text Comparison

Text diff (also known as text comparison or diffing) is the process of finding differences between two texts. This tool is essential for developers, writers, and anyone who needs to track changes in documents.

LCS Algorithm

We use the Longest Common Subsequence algorithm, the same approach used by Git and other version control systems, ensuring accurate and reliable comparison results.

100% Private

Unlike many online tools, our Text Diff runs entirely in your browser. Your text never leaves your device, ensuring complete privacy for sensitive documents.

Export Formats

Download your diff results as plain text for quick sharing, or as HTML with full syntax highlighting for presentations and documentation.