⚙️ Developer Tools
JSON Formatter & Validator
Paste JSON to format, validate or minify it. Syntax errors are highlighted immediately. All processing happens in your browser.
Output appears here…
✅ Copied!
Advertisement
Free JSON Formatter & Validator — Beautify and Minify JSON
Our free JSON formatter beautifies minified JSON into readable indented format, validates syntax with error highlighting, and minifies JSON back to compact form. Essential for developers, API testers and data engineers.
✨ Beautify
Indent and format minified JSON for readability.
🗜 Minify
Remove whitespace for production use.
✅ Validate
Syntax errors shown with line and column numbers.
📋 Copy Output
One-click copy of formatted or minified JSON.
How to Use — Step by Step
1
Paste your JSON
Paste raw or minified JSON into the input area.
2
Click Format or Minify
Format to beautify, or Minify to compress.
3
Check for errors
Syntax errors are highlighted with line and column number.
4
Copy the result
Copy formatted output for code, API testing or documentation.
Frequently Asked Questions
Common JSON syntax errors?
Missing or extra commas, single quotes instead of double quotes, unquoted keys, and missing closing brackets or braces.
JSON vs JavaScript objects?
JSON requires double-quoted keys, disallows functions and trailing commas. JavaScript objects are more flexible. JSON is a strict text-only subset.
Best indentation for JSON?
2 spaces is most common (used by npm and most APIs). 4 spaces is common in Python and Java projects.
Can I format JSON with comments?
Standard JSON disallows comments. Files with comments are JSONC or JSON5. Remove comments before pasting.
What is JSON Schema?
A vocabulary for validating JSON structure — checking required fields exist and values are the correct type. Our formatter validates syntax only, not schema conformance.
🛠 Related Tools You Might Need
These tools work great together — use them in combination for your workflow.