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JSON Formatter & Validator

Beautify, minify, validate, convert, and analyze JSON data. All processing happens locally.

Characters: 0 Lines: 0 Size: 0 B Keys: 0 Depth: 0

Features

Format & Minify

Validate

Convert

Compare

Tree View

Path Finder

Sort Keys

Client-Side

About the JSON Formatter & Validator

A JSON formatter takes messy, minified, or hard-to-read JSON and turns it into clean, indented, colour-highlighted output you can actually read. Our free JSON Formatter also validates your data, pinpointing syntax errors with line numbers so you can fix them fast.

Everything runs entirely in your browser — your JSON is never uploaded to a server, making it safe for API responses, config files, and sensitive payloads.

How to use the JSON Formatter & Validator

  1. 1

    Paste your JSON

    Copy your JSON data and paste it into the input box.

  2. 2

    Format or minify

    Click Beautify to indent and highlight it, or Minify to compress it to one line.

  3. 3

    Check for errors

    Invalid JSON is flagged with the exact location of the problem so you can correct it.

  4. 4

    Copy the result

    Copy the formatted or minified output back to your project with one click.

Frequently asked questions

Is this JSON formatter free?
Yes, it is completely free with no sign-up, no limits, and no watermarks.
Is my JSON data safe?
Yes. All formatting and validation happens locally in your browser using JavaScript. Your data is never sent to or stored on any server.
What is the difference between beautify and minify?
Beautify adds indentation and line breaks to make JSON human-readable. Minify removes all whitespace to make the file as small as possible for production use.
Can it validate JSON?
Yes. If your JSON has a syntax error such as a missing comma or bracket, the tool highlights it and describes the problem so you can fix it.

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