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HomeToolsjson formatter validator

JSON Formatter & Validator (Combined)

Developer Tools

All-in-one JSON suite: Format, validate, prettify, minify, and inspect JSON payloads.

Looking for step-by-step documentation for JSON Formatter & Validator (Combined)?
Read Tools Guide
Indent:
Presets:
Valid JSON Syntax
Characters: 485Size: 0.47 KBLines: 26Keys: 15Max Depth: 5

Client-Side Privacy Guarantee

100% Private & Client-Side: Evaluated entirely within your browser memory.

What is this?

A comprehensive JSON utility suite that combines prettifying, minifying, RFC 8259 syntax validation, and structural inspection in a unified dual-pane interface.

Key Features & Concepts

  • Pretty-print formatting with custom indentation (2/4 spaces, tabs)
  • Instant RFC 8259 syntax validation and line error highlighting
  • Minification and whitespace compression mode
  • Auto-repair tool for single quotes and trailing commas
  • One-click Copy and JSON file export
  • 100% Client-side privacy guarantee

How to Use

  1. Paste your raw or minified JSON text into the input box.
  2. Click "Format JSON" to expand or "Minify JSON" to compress.
  3. Check the real-time validation badge for syntax compliance.
  4. Copy or download the result.

Common Use Cases

  • Full-Stack Engineers, API Designers, and Database Administrators

Practical Examples

  • Validating and formatting API payloads from cURL commands or browser network logs

Limitations & Technical Notes

  • Strictly follows RFC 8259 specification requirements.

Frequently Asked Questions

Does this tool store any of my JSON data?

No. Everything stays in your browser session and is cleared when you refresh or navigate away.

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