๐ง JSON Formatter
JSON Formatter pretty-prints (2 or 4 spaces), minifies and validates JSON entirely in your browser โ paste, click, copy. Validation points at the offending syntax so broken API responses can be fixed in seconds. Key order stays exactly as written (there is no sorting option), and your data never leaves the tab.
- PriceFree, no signup
- ActionsFormat ยท Minify ยท Validate
- UploadNever โ local
- OutputFormatted JSON text
Which button for which mess
| What you have | Button | Result |
|---|---|---|
| Minified API response | Format (2 spaces) | Readable at a glance |
| Preference for wider indent | Format (4 spaces) | Same JSON, deeper indent |
| Payload to ship or log | Minify | Single line, whitespace gone |
| "Unexpected token" error | Validate | Points at the offending spot |
| Trailing comma | Validate flags it | JSON forbids them โ remove it |
| Keys in alphabetical order | Not supported | Order stays exactly as written |
๐ฅ Input JSON
โ๏ธ Actions
๐ค Output
JSON Formatter: Format, validate, and beautify JSON
JSON Formatter lets you format, validate, and beautify json. Upload JSON text and get formatted JSON โ all processed locally in your browser, with no uploads and no sign-up.
Pretty-print minified JSON
Pretty-print minified JSON. This is one of the most common reasons people reach for JSON Formatter โ and it handles the job in seconds, entirely in your browser.
Validate JSON syntax errors
Validate JSON syntax errors. This is one of the most common reasons people reach for JSON Formatter โ and it handles the job in seconds, entirely in your browser.
Beautify API responses for reading
Beautify API responses for reading. This is one of the most common reasons people reach for JSON Formatter โ and it handles the job in seconds, entirely in your browser.
Everything You Need in a JSON Formatter
Powerful features that make JSON Formatter fast, private, and free.
Instant Processing
Conversion and validation happen as you type.
Developer-Grade
Built for accurate, standards-compliant results.
100% Private
All processing is local โ no data is sent anywhere.
Copy & Export
One-click copy to clipboard for quick use.
Free Forever
No sign-up, no API keys, no limits.
Format 2 or 4 Spaces
Pretty-print with a choice of indentation, minify to one line, and pinpoint syntax errors.
How to Use
Paste your JSON
Add the raw or minified JSON you need to inspect. It can be an API response, a config file, or any JSON structure.
Format or validate
Click to pretty-print the JSON with indentation, or validate it to catch syntax errors like missing commas or brackets.
Review the result
Read the formatted output to understand the structure, or fix any validation errors it reports.
Copy the clean JSON
Copy the formatted or corrected JSON back into your project or editor.
Detailed User Guide
Pretty-print minified JSON for readability
Minified JSON is hard to read; this tool adds indentation and line breaks so nested objects and arrays become easy to scan. It is the fastest way to inspect an API response.
Validation catches the common JSON errors
The tool flags trailing commas, missing braces, unquoted keys, and other syntax mistakes, saving you from hunting through a huge blob for a single error.
Works entirely in your browser
Your JSON is processed locally, so API keys, tokens, and internal data embedded in the payload never leave your machine.
Handle large payloads with care
Very large JSON files can be formatted, but extremely large payloads may slow the browser. Format in chunks if the input is huge.
Great for debugging integrations
When an API returns a confusing minified response, paste it here to see the structure clearly before writing your parsing code.
Indentation options
Pick 2-space or 4-space indentation with one click, or minify to a single line. There is no key-sorting option โ key order stays exactly as written in your input.
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