JSON Formatter, Validator & Minifier
Paste any JSON and instantly format it with proper indentation, validate it for errors, minify for production, or convert between JSON formats.
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JSON Formatter & Validator
DeveloperFree · No signup
Indent:
❌ Syntax Error:
Guide
How to Use JSON Formatter & Validator
Paste JSON
Paste your JSON string, API response, or configuration into the input area.
Format or Minify
Click "Format" to prettify with indentation, or "Minify" to compress whitespace.
Check for Errors
If your JSON has syntax errors, they'll be highlighted with the exact line and column.
Copy Result
Click "Copy" to copy the formatted/minified JSON to your clipboard.
Frequently Asked Questions
JSON (JavaScript Object Notation) is a lightweight data-interchange format. It's easy for humans to read and write, and easy for machines to parse and generate. It's widely used in APIs and configuration files.
Common JSON errors include: missing commas between properties, trailing commas after the last item, unquoted strings, single quotes instead of double quotes, and missing brackets. Our validator highlights the exact error location.
JSON minification removes all whitespace (spaces, tabs, newlines) to reduce file size. Useful for production APIs and network transmission where every byte counts.
JSON5 is an extension of JSON that allows comments, trailing commas, unquoted keys, and single quotes. Standard JSON is stricter. Our formatter works with standard JSON.
Not directly in this tool — try our JSON to CSV converter for that. This formatter focuses on prettifying and validating JSON structure.