JSON Formatter
Pretty-print and minify JSON
What is JSON Formatter?
JSON Formatter is a free developer utility from Farvixo that lets you pretty-print and minify JSON. Your input is processed locally in the browser — nothing is sent to a server, which matters when the payload is a token, a config file or production data. Free, unlimited, no sign-up.
How to use JSON Formatter
Paste your snippet into JSON Formatter. It stays on your device, which matters when you are handling tokens, config or production data.
JSON Formatter processes the input instantly and points at the exact line when something is malformed, so you can fix it rather than hunt for it.
Copy the result to your clipboard or download it. Free, unlimited and no sign-up.
Frequently Asked Questions
Is the JSON Formatter free?
Yes — unlimited formatting and validation, free, with no signup. Everything runs in your browser.
Is my JSON uploaded anywhere?
No. All formatting and validation happen locally in your browser, so you can safely paste JSON containing tokens or personal data.
What does the validator catch?
It pinpoints the line and character of syntax errors like trailing commas, single quotes, unquoted keys, missing brackets and duplicate keys.
Can I minify JSON too?
Yes. Switch to Minify to strip whitespace and produce compact JSON for payloads and configs, or Beautify to indent it for reading.
Is there a size limit?
Because processing is local, the limit depends on your device memory. Large multi-megabyte files format smoothly on modern devices.
What you can use JSON Formatter for
- Inspecting or reformatting an API payload while debugging
- Decoding a token or encoded value without pasting it into an unknown website
- Generating test data or identifiers during development
- Validating a config file before it is committed or deployed
JSON Formatter at a glance
- Tool
- JSON Formatter — Developer Tools
- Purpose
- Pretty-print and minify JSON
- Input
- Text or values you enter directly
- Output
- Processed output you can copy to the clipboard or download
- Processing
- In your browser — files are never uploaded to a server
- Price
- Free, unlimited, no account required
- Limitations
- Bounded by your device's memory and CPU rather than a server quota
Tips for better results
- Because processing is local, it is safe to paste real credentials or production payloads here — nothing is transmitted or logged.
- When parsing fails, the reported line and column point at the first invalid token, which is usually just after the real mistake.
- Bookmark the tool page directly; it loads without an account and works offline once cached.
Common problems and how to fix them
Parsing fails on valid-looking input
Usually a trailing comma, a smart quote pasted from a document, or an unescaped backslash. Check the reported position first.
Output has unexpected whitespace or line endings
The source used CRLF line endings or a non-breaking space. Normalise the input before processing.
Non-English characters come out wrong
The input was not UTF-8. Re-save the source as UTF-8 and paste it again.
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