Text Diff is a free online tool. Compare two texts line by line with highlighted differences, split view, inline highlights, and fold matching lines No signup required - use it directly in your browser.

Yes, all tools provided by WebTools are completely free to use with no signup required.

Absolutely safe. All data processing happens locally in your browser. Nothing is uploaded to any server, ensuring your privacy is fully protected.

Do I need to install software to use Text Diff?

No installation needed. All tools run in your browser - just open the page and start using them immediately.

What is a diff checker?

A diff checker (or diff tool) compares two texts and shows the differences between them. It highlights which lines were added, removed, or modified, making it easy to see what changed between two versions.

What's the difference between side-by-side and inline diff?

Side-by-side diff shows both texts in two columns with differences highlighted. Inline diff (unified diff) shows both texts merged into one view with additions and deletions marked. Choose whichever is easier for your use case.

Can I compare code with this tool?

Yes. This tool works with any plain text, including source code, configuration files, JSON, XML, HTML, and more. It's language-agnostic and compares text character by character.

What is character-level diff?

Character-level diff highlights changes at the individual character level within a line, not just at the line level. This gives you more precise information about what exactly changed within a modified line.

Is my text data secure?

Yes. All text comparison happens entirely in your browser. Your data is never sent to any server, stored, or logged. You can even use this tool offline once the page is loaded.

Text Diff

Text Diff Checker is a free online tool that helps you compare two texts and find the differences between them. Whether you're comparing code revisions, document versions, or configuration files, this tool highlights additions, deletions, and modifications with clear visual indicators — no signup, no installation, completely private.

Original

Modified

Shortcut: Ctrl + Enter to compare

Text Diff Guide

Line Mode：Compare text line by line with unified and split views.

Char Mode：Compare character by character for precise differences.

Fold：Auto-fold identical lines to focus on changes.

Line/Char CompareChar Highlight

What is Text Diff Checker?

Side-by-side and inline diff view modes
Character-level and line-level comparison granularity
Color-coded highlights: green for additions, red for deletions
Line numbers for easy reference
Swap left and right inputs with one click
One-click copy of either text
All processing happens locally in your browser

How to Use Text Diff Checker

1
Paste the original text
Paste the original or older version of the text in the left input box.
2
Paste the modified text
Paste the modified or newer version in the right input box.
3
Choose comparison mode
Select "Side by Side" for a two-column view or "Inline" for a unified view.
4
Review the differences
Added lines are highlighted in green, deleted lines in red. Line numbers help you locate changes.

Frequently Asked Questions

Text Diff

What is Text Diff Checker?

Side-by-side and inline diff view modes

Character-level and line-level comparison granularity

Color-coded highlights: green for additions, red for deletions

Line numbers for easy reference

Swap left and right inputs with one click

One-click copy of either text

All processing happens locally in your browser

How to Use Text Diff Checker

Paste the original text

Paste the original or older version of the text in the left input box.

Paste the modified text

Paste the modified or newer version in the right input box.

Choose comparison mode

Select "Side by Side" for a two-column view or "Inline" for a unified view.

Review the differences

Added lines are highlighted in green, deleted lines in red. Line numbers help you locate changes.

Text Diff

Text Diff Guide

What is Text Diff Checker?

How to Use Text Diff Checker

Frequently Asked Questions

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Text Diff

Text Diff Guide

What is Text Diff Checker?

How to Use Text Diff Checker

Frequently Asked Questions

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