Code Diff — Compare Code Online

Online Code Diff Tool for Developers

When reviewing code changes, having a clear visual diff is essential. Our online code diff tool shows you exactly what changed between two versions of your code, with additions highlighted in green and deletions in red.

The word-level inline highlighting goes beyond simple line-by-line comparison. If a variable name or function parameter changed within a line, the specific change is highlighted, making it easy to spot even the smallest modifications.

Perfect for Code Reviews

• Compare two versions of a file before committing
• Review pull request changes outside of your Git platform
• Compare code snippets from different sources
• Debug differences between working and broken code
• Compare configuration files across environments

Supports All Programming Languages

JavaScript, TypeScript, Python, Java, C#, Go, Rust, Ruby, PHP, Swift, Kotlin, C++, HTML, CSS, SQL, YAML, JSON, and any other text-based language or format. Our tool works with raw text, so you can compare strings online regardless of language — there's no limitation.