JSON Formatter

⌘↵ toggle format/minify🤖 Agent Ready

Format, validate, and minify JSON — instant syntax checking and pretty-printing

Indent
JSON Input
Formatted JSON
{
  "name": "devpick",
  "tools": 36,
  "categories": [
    "format",
    "encode",
    "convert",
    "generate",
    "network",
    "compare"
  ],
  "meta": {
    "author": "devpick",
    "url": "https://devpick.sh"
  }
}

JSON formatter online for API debugging

Use this free JSON formatter and JSON validator to clean API responses, lint malformed payloads, and convert messy one-line JSON into readable structured data. Everything runs locally in your browser.

  • Pretty print JSON for logs, docs, and code reviews
  • Minify JSON before sending payloads over the network
  • Validate syntax and spot errors before shipping requests

Continue your JSON workflow

After formatting JSON, validate against a schema with JSON Schema Validator, inspect nested paths in JSON Viewer, query fields with JSONPath Tester, or convert payloads using JSON → YAML.

Frequently Asked Questions

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data format for storing and exchanging data. It uses key-value pairs and supports strings, numbers, booleans, arrays, objects, and null.

How do I validate JSON?

Paste your JSON into the input box. If it turns red or shows an error banner, your JSON has a syntax error. Common issues include missing quotes around keys, trailing commas, and unescaped special characters.

What is the difference between JSON and XML?

JSON uses a compact key-value syntax that is native to JavaScript, while XML uses verbose opening and closing tags. JSON is generally faster to parse and easier to read for most data structures.

Can I minify JSON to reduce file size?

Yes! Switch to 'Minify' mode to strip all whitespace and produce the most compact JSON representation. This is useful for reducing API payload sizes and improving performance.

Related Tools

Working with APIs or config files? Keep the full JSON workflow in one place: validate structure, query fields, convert between YAML and JSON, then generate TypeScript types.

JSON Schema ValidatorJSON ViewerJSONPath TesterJSON → YAMLYAML → JSONJSON → TypeScript