No — it only checks parse errors, not style or undefined variables.

JavaScript Validator

Paste a snippet or a whole file to see if it parses as valid ECMAScript. The tool tries module mode first (import/export), then classic script mode, and reports the first syntax error with location when both fail.

JavaScript Validator

Input

Output

How to Use This Tool

Paste code.
Click Validate syntax.
Read the success message or error with line/column.

Features

Acorn parser (latest ECMAScript)
Module then script fallback
Line/column on errors

Frequently Asked Questions

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