How does the JSON validator check my syntax?

The validator uses browser-native JSON parsing conforming to ECMAScript and RFC 8259 standards to verify bracket matching, quotation, escaping, and type validity.

Can comments be added to JSON?

Standard JSON does not allow comments (neither // nor /* */). If you need comments, consider JSONC (JSON with Comments) or YAML.

JSON Validator — Online JSON Syntax Checker & Linter with Error Highlighting

How to Use the JSON Validator

Paste JSON Text

Paste the JSON data you wish to validate into the editor.

Run Validation

The tool immediately parses the syntax and flags any syntax errors.

Fix Highlighted Errors

Read the error diagnostics to locate missing quotes, brackets, or commas.

Why Choose Our JSON Validator?

Instant syntax validation as you type

Accurate error message with line and column numbers

100% private in-browser analysis

One-click format and copy

Pro Tips for Best Results

Bookmark this page (Ctrl+D / Cmd+D) for fast offline-capable access whenever you need it.
Use keyboard shortcuts (Tab / Enter / Space) for quick form navigation without touching your mouse.

Frequently Asked Questions

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