What is JSON Formatter?
JSON Formatter beautifies, validates and minifies JSON data. Paste raw or minified JSON to get neatly indented, syntax-highlighted output, or compress formatted JSON into a single line for production use. You can also sort object keys alphabetically.
When JSON is invalid, you get a clear error with the line and column plus hints for common mistakes like trailing commas, single quotes and unquoted keys. Your data — which may include API keys or customer records — is never sent to a server.
How to use JSON Formatter
Get it done in 4 simple steps — no installation or account needed.
- Paste your JSON into the input box — it is formatted automatically as you type.
- Choose Format, Minify or Sort keys, and pick the indentation.
- If there is an error, read the message and hint to locate the problem.
- Copy the output or save it as data.json.
Who needs JSON Formatter?
From students to professionals, here’s who gets the most out of JSON Formatter — and why.
Developers
Read API responses and debug payloads quickly.
QA engineers
Validate test data and request bodies.
Data analysts
Inspect exported JSON from tools and databases.
Students
Learn JSON structure with readable, highlighted output.
Is JSON Formatter safe to use?
Yes. JSON Formatter runs entirely in your web browser using JavaScript. Your files and data are processed on your own device and are never uploaded to AppsOcean or any third-party server. There’s nothing to install, no account to create, and it’s completely free.Read our privacy policy.
JSON Formatter — frequently asked questions
What is the difference between formatting and minifying?
Formatting adds indentation and line breaks for readability. Minifying removes all unnecessary whitespace to make the data as small as possible.
Is JSON with comments supported?
Standard JSON does not allow comments, so they are reported as errors. Remove them before formatting.
Are my files uploaded to a server?
No. Everything is processed locally in your browser using JavaScript. Your files never leave your device, and nothing is stored on our side.
Why is my JSON invalid?
Common causes are trailing commas, single quotes instead of double quotes, and unquoted keys. The error message shows the position of the problem.
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