What Is JSON Formatter & Validator?

A free online JSON formatter and validator. Beautify messy JSON, minify for production, validate syntax errors, and escape/unescape JSON strings. Get instant statistics on keys, items, and file size — all running locally in your browser.

Why Use JSON Formatter & Validator?

  • Instant validation with clear error messages
  • Beautify with 2/4 spaces or minify for production
  • Escape and unescape JSON strings
  • Live statistics: key count, data type, file size

How to Use JSON Formatter & Validator — Step by Step

1

Paste your JSON into the input field.

2

The tool instantly validates and formats it.

3

Use Beautify, Minify, Escape, or Unescape as needed.

4

Copy the result or download as a .json file.

Who Is JSON Formatter & Validator Best For?

  • API debugging
  • config files
  • data transformation
  • JSON validation

JSON Formatter & Validator — Frequently Asked Questions

Can this handle large JSON files?

Yes, the formatter can handle large JSON structures. However, extremely large files (over 1MB) may slow down the browser.

Does it support JSON with comments (JSONC)?

Standard JSON does not allow comments. Remove comments before formatting, or the validator will report an error.

Ready to Use JSON Formatter & Validator?

Free online tool — works in your browser, no sign-up required. Start using it right now.

Try It Now

You Might Also Like

QR Code Generator

Create custom QR codes for URLs, WiFi, text, and more. Customize colors, size, and download as PNG or SVG.

Try Now

Base64 & URL Encoder

Encode and decode Base64 and URL strings with full Unicode support. Fast, local, and free.

Try Now
Free Forever · No Sign-up

179 Free Tools at Your Fingertips

All free online tools for developers, designers, students, and creators. Every tool works in your browser — no sign-up, no data collection.

Browse All ToolsJSON Formatter & Validator