What is Unified Diff format?

Unified Diff is a standard text difference format, widely used in Unix/Linux systems and version control systems like Git. It uses --- and +++ to identify files, @@ to mark change hunks, - for deleted lines, + for added lines, and space for unchanged lines. This format can be directly applied by the patch command.

What's the difference between Side-by-Side and Unified views?

Side-by-Side view displays the original and new texts side by side for easy line-by-line comparison. Unified view merges all changes into a single list using +/- markers, closer to standard patch file format, suitable for developers reading and generating patches.

How do I use the Patch feature?

Generate Patch: Enter the original text on the left and modified text on the right, then click "Generate Patch" to get a standard Unified Diff format patch. Apply Patch: Enter the original text on the left, paste the Unified Diff patch on the right, then click "Apply Patch" to apply the patch to the original text.

How large of a text does this tool support?

This tool runs entirely in the browser and does not upload any data. It runs smoothly for text comparison and patch generation up to tens of thousands of lines. Very large files (over 100K lines) may slow down the browser; we recommend processing large files in segments.

Diff/Patch

Text diff comparison

Original Text

Comparison Text / Patch Input (New / Patch)

Diff/Patch Tool Usage Guide

Key Features

Text Comparison - Compare two texts line by line, highlighting additions and deletionsrows比较两 paragraphs文本，高亮新增、删除、修改 modifications
Side-by-Side - Compare differences side-by-side for clear visualization
Unified View - Display in standard Unified Diff format
Generate Patch - Output differences as a standard Unified Diff patch
Apply Patch - Apply Unified Diff patches to original text

Use Cases

Code version comparison
Generate Git-style patch files
Configuration file change review
Document revision tracking
Team collaborative code review

Diff/Patch

Diff/Patch Tool Usage Guide

Key Features

Use Cases

常见问题

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