Skip to content
Developer Tools

JSON Formatter & Validator

Beautify, validate and minify JSON with clear error reporting.

FreeNo loginBrowser basedPrivacy friendly
By MerQPrime Editorial TeamUpdated 2026-06-20Reviewed 2026-06-20Editorial policy
Loading tool…

Overview

About the JSON Formatter & Validator

Clean up messy JSON in an instant. Paste your data to beautify it with consistent indentation, validate its structure with precise error messages, or minify it to the smallest possible size for production.

Benefits

How it works

  1. 1Paste or type your JSON into the input area.
  2. 2Choose Format to pretty-print, Minify to compress, or Validate to check syntax.
  3. 3Any syntax errors are reported with a clear, human-readable message.
  4. 4Copy the result to your clipboard when you're done.

Applications

Use cases

  • Debug API responses and configuration files.
  • Beautify minified JSON for easier reading and review.
  • Shrink JSON payloads before shipping to production.
  • Validate JSON before importing it into another system.

Support

Frequently asked questions

Is my JSON uploaded anywhere?
No. All parsing, formatting and validation happen locally in your browser. Your data is never transmitted.
What indentation options are available?
You can format with 2 spaces, 4 spaces or tabs to match your project's style.
Why does it say my JSON is invalid?
Common causes include trailing commas, single quotes instead of double quotes, missing brackets, or comments (which standard JSON does not allow). The error message points to what went wrong.

Explore more

Learn more

Explore more

Related tools, guides & pages

JSON Formatter (Validate & Minify) | MerQPrime