Free OnlineDeveloper Tools
Code Diff Tool
Compare two code files side by side with syntax highlighting. Find differences in source code with line-level precision.
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Key Features — Code Diff Tool
Side-by-side and unified diff views
Syntax highlighting for 50+ languages
Line-level and character-level diff
Ignore whitespace and comment options
Navigate between changes with keyboard shortcuts
Why Use This Tool — Code Diff Tool
Free Online Code diffCompare code — for EveryoneFast & Easy Code comparisonDiff tool — 100% FreeFree Online Source code diff
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Works Everywhere
Use on any device — desktop, tablet, or phone. No downloads or plugins needed.
Frequently Asked Questions — Code Diff Tool
How is this different from the text diff checker?
The code diff tool adds syntax highlighting for programming languages, making it much easier to review code changes. It also includes language-specific options like ignoring comments and understanding indentation-sensitive languages.
Which programming languages are supported?
The tool provides syntax highlighting for over 50 languages including JavaScript, TypeScript, Python, Java, C, C++, C#, Go, Rust, Ruby, PHP, Swift, Kotlin, HTML, CSS, SQL, Bash, YAML, JSON, and many more.
Can I upload files directly instead of pasting code?
Yes. Each editor panel has an upload button that lets you load a file from your device. The tool auto-detects the programming language from the file extension and applies appropriate syntax highlighting.