# JSON Formatter

> Format, beautify, and validate JSON with adjustable indentation — instantly in your browser.

URL: https://uttir.com/json-formatter
Categories: developer-tools, data-tools
Privacy: Your JSON is formatted entirely in your browser and never uploaded anywhere.

## About

The JSON formatter takes raw, minified, or messy JSON and rewrites it with consistent indentation and line breaks so you can actually read it. It also validates the document while formatting, so syntax errors are reported with the exact line and column instead of silently passing through.

Because formatting happens locally with your browser’s built-in JSON parser, nothing you paste ever leaves the page — safe for API responses, configuration files, and anything containing credentials or personal data.

## How to use

1. **Paste your JSON** — Drop minified or messy JSON into the input panel.
2. **Pick an indentation style** — Choose 2 spaces, 4 spaces, or tabs to match your project’s style.
3. **Read or copy the result** — The formatted output appears instantly. Use Copy to grab it.

## Examples

### Minified to readable

A single-line API response becomes structured, readable JSON.

Input:

```
{"id":42,"name":"Uttir","tags":["free","fast"]}
```

Output:

```
{
  "id": 42,
  "name": "Uttir",
  "tags": [
    "free",
    "fast"
  ]
}
```

## FAQ

### Does formatting change my data?

No. Formatting only changes whitespace. Keys, values, and order are preserved exactly as parsed.

### Why is my JSON invalid?

Common causes are trailing commas, single quotes instead of double quotes, unquoted keys, or comments. The tool reports the line and column of the first problem it finds.

### Is my data uploaded to a server?

No. Parsing and formatting run entirely in your browser using its native JSON engine.

## Related tools

- [JSON Validator](https://uttir.com/json-validator) — Check whether your JSON is valid and find the exact line and column of any syntax error.
- [CSV to JSON Converter](https://uttir.com/csv-json-converter) — Convert CSV to JSON and JSON to CSV instantly, right in your browser.
- [JWT Decoder](https://uttir.com/jwt-decoder) — Decode a JWT’s header and payload and check its expiration — without sending it anywhere.
- [SQL Formatter](https://uttir.com/sql-formatter) — Format and beautify SQL queries for MySQL, PostgreSQL, SQLite, and more — with optional keyword uppercase and tab indentation.
- [JSON-LD Schema Generator](https://uttir.com/json-ld-generator) — Generate valid schema.org JSON-LD structured data for articles, FAQs, organizations, and local businesses.

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For the full HTML page with the live tool, visit https://uttir.com/json-formatter.
This file is the markdown rendering at https://uttir.com/json-formatter.md. See https://uttir.com/llms.txt for a site-wide summary.