JSON Formatter & Beautifier Online
Format, beautify and validate JSON online with our free JSON Formatter. Paste your JSON, format it instantly, and copy the cleaned result.
Your JSON is processed directly in your browser and is not uploaded to our servers.
What is a JSON Formatter?
A JSON formatter is an online developer tool that converts minified or poorly formatted JSON into a readable, indented structure. Properly formatted JSON makes APIs, configuration files and debugging much easier to work with — especially when you're staring at a single-line response dumped straight from a network tab.
Use this free JSON beautifier to format JSON online, validate the structure as you go, and instantly spot the missing comma or bracket that's breaking your parser. It works entirely in your browser, so nothing you paste is ever sent to a server.
How to Format JSON Online
Paste your JSON
Paste your JSON into the input field above.
Click Format JSON
Choose your indent size, then click the Format JSON button.
Review the output
Check the formatted, indented result — invalid JSON shows a clear error instead.
Copy the result
Click Copy to grab the cleaned-up JSON for your code or config file.
JSON Formatter Features
Before & After
{"name":"John","age":30,"city":"New York"}{
"name": "John",
"age": 30,
"city": "New York"
}Why Use This JSON Formatting Tool?
Minified JSON from an API response or a build output is fast to transmit but painful to read. This online JSON formatter beautifies it instantly so you can trace nested objects and arrays without manually counting brackets, and it validates the structure at the same time — so formatting and debugging happen in one step instead of two.
Frequently Asked Questions
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