JavaScript Validator
Checks whether JavaScript code has valid syntax.
Lilu Baba's JavaScript Validator checks your code's syntax using your browser's own real JavaScript engine (not a custom parser), so results are as accurate as the browser running your code would be.
How to use this tool
- Paste your JavaScript code.
- Its syntax validity updates instantly, using your own browser's real JavaScript engine.
FAQ
JavaScript Validator — frequently asked questions
No — it only checks syntax validity by attempting to compile the code as a function, without ever calling or running it.
No — only syntax errors are caught; logical bugs that are syntactically valid won't be flagged.