JSON Formatter
The JSON Formatter tool lets you paste raw JSON and instantly view it in a clean, readable format. Detect errors, validate structures, and format data for better debugging and documentation.
The JSON Formatter tool lets you paste raw JSON and instantly view it in a clean, readable format. Detect errors, validate structures, and format data for better debugging and documentation.
Welcome to our free and fast JSON Formatter, your go-to tool for formatting, beautifying, validating, and viewing JSON data online. Whether you're a developer, data analyst, or just someone working with APIs, this tool helps you read and debug JSON effortlessly.
JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy to read and write for both humans and machines. It's commonly used to transmit data between a server and web applications or mobile apps.
We respect your privacy. All data entered is processed locally in your browser and is never stored or sent to any server. This ensures 100% data confidentiality.
Before formatting:
{"name":"Alice","age":30,"city":"Delhi"}
After formatting:
{
"name": "Alice",
"age": 30,
"city": "Delhi"
}
If you find this tool useful, feel free to share it with your friends and colleagues. We’re committed to building more free and useful web utilities for developers and tech enthusiasts.
A formatter changes only whitespace, so the data stays the same. The tool first tries the strict JSON parser, and if that fails it falls back to a safe literal parser. This makes it forgiving: unquoted keys, single quotes, trailing commas and comments are accepted and the output is rewritten as standard JSON, as RFC 8259 defines it. You can choose two, three or four spaces of indentation, or minify to a single line. Pretty printing places each key on its own line and indents nested objects and arrays, which makes the hierarchy visible.
Because the data is parsed and rebuilt, a few things can differ from the original text. Duplicate keys collapse so the last value survives. Number formatting is normalized, so 1.50 becomes 1.5, and integers above 9007199254740991 lose precision. Keys that look like whole numbers are sorted first in ascending order. Unicode escapes like \u00e9 become the real character. If the input cannot be parsed in either way, an error message describes the problem and its position, such as a missing comma or unterminated string, so you can correct it.
A JSON Formatter is a tool that helps you format and beautify JSON data to make it readable and easy to debug. It adds indentation so the structure and hierarchy are easy to follow.
Yes, your data is completely secure. All formatting is done directly in your browser. We do not store or share your input with any server.
Yes. The tool checks whether your JSON is valid and shows the parser error message if it is not, so you can find and fix the problem.
Absolutely! You can switch between formatted and minified versions of your JSON with a single click.
No sign-up is required. All tools on {{project.site_name}} are completely free to use without registration.
Yes, the site and all tools are responsive and work smoothly on mobile devices and tablets.
Keys keep their original order, with one exception: keys that look like whole numbers, such as 1 or 25, are moved to the front in ascending order, which is how JavaScript objects behave.
If strict parsing fails, the tool tries a lenient parser that accepts unquoted keys, single quotes, comments and trailing commas. The output is always rewritten as strictly valid JSON.