What does a JSON validator do?

A JSON validator checks your JSON data against the RFC 8259 standard and reports any syntax errors such as missing commas, unclosed brackets, or invalid values.

Is my data safe when using this validator?

Completely safe. Validation runs entirely in your browser with zero server uploads.

JSON Validator & Linter

Validate structured data against RFC standards to ensure error-free JSON.

JSON input

Upload

Validation result

No JSON entered

Paste JSON above or upload a file. Validation runs automatically as you type.