JSON Formatter & Validator
Validate, format, prettify, or minify your JSON data. Check JSON validity and download formatted files instantly.
Formatted JSON will appear here
How to use json formatter & validator
- 1
Paste JSON
Paste your raw JSON text or drag and drop a .json file into the input editor.
- 2
Format
Click Format to beautify the code with indentations, or Minify to compact it.
- 3
Validate
Check the validation panel for any syntax errors or issues.
- 4
Copy or Download
Click Copy to clipboard or download the output as a formatted .json file.
About the JSON Formatter & Validator
JSON has no built-in whitespace rules, so API responses and log dumps are often returned as a single unreadable line. This formatter re-indents nested objects and arrays so you can actually trace how a payload is structured, and flags the exact character where parsing fails — a missing comma, an unescaped quote inside a string, or a trailing comma before a closing brace, all of which are technically invalid JSON even though they're easy to miss by eye.
Developers use this most often when debugging a webhook payload, inspecting a REST API response pasted from browser dev tools, or cleaning up a config file before committing it. Minify mode does the opposite: it strips whitespace to shrink a JSON file for production use, which matters for anything shipped to a browser where every byte adds to load time.
Frequently Asked Questions
Is my JSON data safe?
Yes. All data processing is done securely in memory and never stored on the server.
How does the validation work?
The formatter attempts to parse the JSON and returns specific error messages with line references if parsing fails.
Can I download the formatted JSON?
Yes, once formatting is completed you can download the formatted data as a .json file.