JSON Validator
Validate JSON syntax — locally in your browser.
Tool
Paste your input and get output instantly. Everything stays in your browser.
Status
Ready
✓ Runs locally
✓ No uploads
✓ No tracking
What the tool does
The JSON Validator checks whether a JSON document is syntactically valid and highlights errors with clear feedback.
When to use it
Use it before sending data to APIs, importing JSON files, or debugging parsing errors.
Quick example
Paste JSON with a missing comma and instantly see where the error occurs.
Security / privacy
Validation is performed client-side only. No JSON content is transmitted or stored.