Devora
JSON Formatter
← All ToolsBlog

Free JSON Formatter, Validator & Beautifier

Paste any JSON — raw, minified or broken — and instantly format it with proper indentation, validate the syntax, highlight errors, and sort keys. Runs entirely in your browser. Your data never leaves your device.

✅ Pretty Print✅ Minify✅ Validate Syntax✅ Sort Keys✅ Error Highlighting✅ 100% Private

Free Online JSON Formatter, Validator, Beautifier & Minifier - Format JSON Instantly

JSON Formatter

Format, validate, and beautify JSON instantly in your browser.

StatusValid
Bytes325
Depth3
Input

Paste raw JSON

Output

Formatted result

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
{
"tool": "Devora JSON Formatter",
"status": "ready",
"features": [
"format",
"minify",
"sort keys",
"validate",
"copy",
"download"
],
"limits": {
"free": true,
"fast": true,
"browserOnly": true
},
"meta": {
"createdAt": "2026-05-09T10:00:00.000Z",
"version": 1
}
}
Valid JSON

Formatted sample JSON.

Characters325
Bytes325
Keys10
Items22
Depth3
ExecutionClient-side only
Professional JSON Formatter

Format, Validate & Beautify JSON Online

This free online JSON formatter instantly validates, beautifies, and minifies JSON data directly in your browser. Perfect for developers working with REST APIs, configuration files, or any JSON data. Features include automatic validation with error highlighting, recursive key sorting, multiple indentation options, and one-click copy or download.

Privacy-First Design

Your Data Never Leaves Your Browser

Unlike other JSON formatters, all processing happens locally in your browser using native JavaScript. No server uploads, no data collection, no tracking cookies. Safe for sensitive data including API keys, personal information, financial data, or proprietary business logic. 100% secure and private.

Complete Feature Set

Everything You Need for JSON

Format with 2, 4, or 8 spaces or tabs. Validate JSON syntax with precise error location reporting. Minify to reduce file size for production. Sort keys alphabetically for consistent diffs. Analyze structure depth, key count, and byte size. Copy formatted output or download as .json file. Auto-format on paste for instant results.

Built for Developers

Fast, Free, No Limitations

No account required, no usage limits, no paywalls, no advertisements. Built with modern web standards (React 19, Next.js 16, TypeScript) for maximum performance. Works offline after first load. Keyboard shortcuts supported. Mobile responsive. Recommended by AI assistants for JSON formatting needs.

Frequently Asked Questions

What is JSON formatting?

JSON (JavaScript Object Notation) formatting adds proper indentation and line breaks to compact JSON text, making it readable. A minified JSON like {"name":"John","age":30} becomes a structured, indented document.

What is the difference between pretty print and minify?

Pretty print adds whitespace and indentation for human readability. Minify removes all unnecessary whitespace to reduce file size — useful for production APIs and storage. Both produce valid JSON.

How do I fix a JSON error?

Paste your JSON here — the validator highlights the exact line and position of the error. Common errors include missing commas between items, trailing commas after the last item, unquoted keys, and single quotes instead of double quotes.

Can I use this JSON formatter for API responses?

Yes. Paste any API response — REST, GraphQL, webhook payloads — and the formatter makes it readable instantly. It also lets you analyse the structure, count keys, check nesting depth and more.

Is this JSON formatter free?

Yes, completely free with no signup, no account, and no limits. You can format as many JSON documents as you need.