JavaScript Diff Tool — Auto-Detect JS/TS · Char-Level · AI Explain
Real-time diff · Character-level · AI summary · Merge mode · Timeline · Git export · 100% browser
Compare JavaScript and TypeScript code with auto-detection. Character-level diff highlights renamed variables, updated function names, and changed strings precisely. AI summary explains what the JS/TS refactoring accomplished.
What is a Code Diff Checker?
A diff checker compares two versions of text or code and highlights what changed. It shows added lines in green, removed lines in red, and changed lines in amber — exactly like git diff or a pull request review on GitHub.
Key Features
This tool includes side-by-side and inline views, character-level diff highlighting (exact words that changed), three diff algorithms (Myers, Patience, Histogram), AI-powered plain English summaries, 3-way merge mode, change timeline, and multiple export formats including .diff (git patch) and HTML reports.
Frequently Asked Questions
Does this support TypeScript?
Yes. TypeScript is auto-detected via const/let/interface/type keywords and the .ts extension. The diff works on the source text — no compilation needed.
Can I compare minified JS?
Yes, but it's not recommended. Use the Ignore Whitespace option and consider reformatting both versions with a JS formatter first for a meaningful diff.