developer tools• Essential
JSON Formatter & Validator
Beautify cluttered JSON into clean, readable indentations, validate syntax, fix trailing commas, or compress into a minified single line.
Processed locally. Sensitive JSON payloads and API responses are never transmitted over the network.
Valid JSON Syntax
Advertisement
Sponsored PlacementGoogle AdSense Integration Ready
How to Use JSON Formatter & Validator
1
Paste JSON
Paste raw JSON text into the editor or upload a .json file.
2
Choose Action
Click Format (2 or 4 spaces) or Minify.
3
Copy or Download
Copy the formatted JSON with one click or download the formatted file.
About JSON Formatter & Validator
Uses recursive AST parsing with `JSON.parse()` and customizable `JSON.stringify(data, null, indent)` replacers.
Supported Formats
JSONJSONCText
Key Features
- 2-space and 4-space indentation formats
- One-click JSON minification for bandwidth savings
- Real-time syntax validation with line/column error diagnostics
- Sort object keys alphabetically
Frequently Asked Questions
Yes, because execution happens entirely within your browser runtime without network calls.
Related Tools
More in developer tools Local
Base64 Encoder & Decoder
Encode text and files to Base64, or decode Base64 strings back to original format.
developer toolsOpen Tool
Local
JWT Decoder
Decode JSON Web Tokens to inspect Header, Payload, and expiration timestamps.
developer toolsOpen Tool
Local
UUID / GUID Generator
Generate cryptographically secure Version 4 UUIDs in bulk.
developer toolsOpen Tool