Developer Tools

JSON Formatter & Validator

Format, validate, prettify, and minify JSON data right in your browser. No data ever leaves your device.

Valid JSON

Lines: 19Characters: 390Size: 390 B

Local Execution (100% Private)

Simple Workflow

How It Works

Format, validate, and minify JSON data directly in your browser.

Paste or Enter JSON

Paste raw, unformatted, or minified JSON into the editor, or click Load Sample to start with template data.

Validate & Detect Errors

The parser automatically validates syntax in real time, pinpointing syntax mistakes and unmatched brackets.

Prettify or Minify

Format your data with clean 2-space or 4-space hierarchical indentation, or minify into a single compact line.

Copy or Download

Copy the clean output to your clipboard with a single click, or save the formatted payload as a .json file.

Format Guide

JSON Formatting & Standards

Understand how formatting structures impact readability and payload weight.

Standard JSON (RFC 8259)

Universal

Standard text-based data format representing structured data based on JavaScript object syntax. Supports objects, arrays, numbers, strings, booleans, and null.

Pretty Printed (2 / 4 Spaces)

Readable

Indented with consistent line breaks and spaces for human debugging, code reviews, and documentation. 2 spaces is standard for modern web development.

Minified JSON

Compact

All whitespace, line breaks, and indents stripped out. Ideal for production API network transfer, database storage, and caching.

FAQ

Frequently Asked Questions

Clear answers to common questions about privacy, capabilities, and offline usage.

Common JSON syntax errors include trailing commas, unquoted property keys, single quotes instead of double quotes, and unescaped control characters. Our validator highlights the exact error description and location so you can resolve it instantly.