What does this tool do?
| Direct answer | JSON Formatter parses your input and prints it with predictable indentation, preserving all values. |
| Key fact | JSON (RFC 8259) has 6 types: 4 primitives (string, number, boolean, null) and 2 structured (object, array). |
| Processing | Runs locally in your browser; no data is sent to a server. |
How to use
- Paste your JSON into the input box.
- Click Format JSON to parse and indent it.
- Review the output, then Copy or Download.
Who is this for?
This tool was built for people who need a fast answer in the browser — no install, no account, no data leaving the device.
Developers formatting API responses or config files, analysts inspecting minified payloads, and students learning structured data formats. If you have ever squinted at a one-line blob hoping to find a missing brace, this page is for you.
Frequently asked questions
Does formatting change my JSON data?
No. Formatting changes whitespace only — keys, values, and ordering are preserved exactly.
Why did formatting fail?
The input was not valid JSON: check for unquoted keys, trailing commas, or comments — JSON allows none of these.
Is my data uploaded anywhere?
No. Parsing and formatting happen entirely in your browser; nothing is sent to a server.