What is a JSON formatter?
A JSON formatter takes raw, minified or messy JSON and rewrites it with consistent indentation and line breaks so it's readable by humans. It also validates the document as it parses — if the syntax is wrong, you get a precise error instead of a silent failure. ServoDev's formatter runs entirely on your device, so sensitive payloads like API responses or tokens never touch a server.
How to use this tool
- 1 Paste your JSON into the Input panel, or hit Load sample to try it.
- 2 Click Format to beautify with 2-space indentation, or Minify to strip whitespace.
- 3 Check the status line — a green Valid JSON confirms it parsed, red shows the exact error.
- 4 Use Copy to grab the result, or Clear to start over.
Frequently asked questions
Is my JSON uploaded to a server?
No. Formatting, minifying and validation all run locally in your browser using the native JSON engine. Your data never leaves your machine — you can even use this tool offline.
What's the difference between Format and Minify?
Format (beautify) adds two-space indentation and line breaks so the structure is easy to read. Minify strips all optional whitespace to produce the smallest valid payload — useful for embedding or reducing transfer size.
Why am I getting an "Unexpected token" error?
That usually means a trailing comma, a single-quoted string, or an unquoted key. Strict JSON requires double-quoted keys and strings and no trailing commas. The error points at the first character the parser couldn't accept.
Is there a size limit?
There's no hard cap, but very large documents (tens of MB) may feel slow because everything is processed on the main thread. For files that big, format in chunks.
Does it preserve key order?
Yes. The formatter keeps keys in their original order rather than sorting them, so a formatted document diffs cleanly against the source.