Code Diff & Merge
Compare two code snippets side-by-side. View additions and deletions with syntax highlighting, and merge changes interactively with a single click.
How to use Code Diff & Merge
- Paste your original code into the Left panel.
- Paste your changed code into the Right panel.
- View highlights in the side-by-side table below. Optionally, check the 'Collapse unchanged lines' box.
- Click the 'Copy →' or '← Copy' buttons to sync changes between sides.
- Copy the merged code directly from the textareas.
What is Code Diff & Merge?
A Code Diff & Merge tool allows software developers to visually compare two code versions, highlighting line-by-line insertions, deletions, and modifications. Interactive merge buttons let you selectively sync changes between the left (original) and right (modified) panels.
This tool runs entirely in your browser. All syntax highlighting, diff logic, and merging execute locally—your code is never sent to any server.
FAQ
- Which programming languages are supported?
- We support auto-detection and syntax highlighting for JavaScript, TypeScript, Python, HTML, CSS, JSON, XML, C++, Java, Rust, Go, and Plain Text.
- Is my source code secure?
- Yes. The comparison and merging run locally on your device using client-side scripts. No data is transmitted.
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