Developer tools · Free · 2 min
JSON Formatter & Validator
Format or minify JSON and catch syntax errors before they reach your application. Your data stays in this browser tab; it is not uploaded to a server.
Your formatted result will appear here.
What this tool helps with
Hard-to-read JSON and unnoticed syntax errors slow down debugging, configuration work, and API testing.
How to use it
- Paste JSON into the input panel.
- Choose Format or Minify.
- Read the validation result and copy the output.
Requirements
A modern browser with JavaScript enabled. No account or server upload required.
Limits and privacy
This utility checks JSON syntax. It does not validate a custom application schema, authenticate API responses, or guarantee that data is safe to execute. Inputs are processed locally in this browser. The site does not provide an upload endpoint for this tool.
Frequently asked questions
Is my JSON uploaded?
No. Parsing and formatting happen locally in your browser.
Does it validate JSON Schema?
No. It validates standard JSON syntax only.
Step-by-step guide
Validate JSON in your browser before using it →