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JSON Formatter

Formats, validates, and minifies JSON in the browser. It is for debugging payloads, config files, API responses, and copied snippets.

Processing

Runs in your browser. Input, settings, and results are not sent to Utilio servers.

How Utilio handles dataHow browser-local processing worksPrivacy Policy

JSON Formatter

Local browser processing. Data stays on this device.

Looks valid

Formatted

JSON was formatted: 5 -> 9 lines.

Keys
3
Objects
1
Arrays
1
Values
5

What to open next

Related tools and guides for the same job.

JSON to YAMLMove API examples into YAML documentation.JSON ValidatorCatch missing commas, trailing commas, and broken strings.URL EncoderEncode search queries, redirect parameters, and callback values.Base64 EncoderEncode sample strings for API tests or documentation.YAML to JSONConvert YAML config fragments into JSON for scripts.Base64 DecoderDecode a sample value from docs or logs.

Helpful guides

Read more about this task, privacy, and common limits.

How to Format JSON in Browser Without Sending It to a ServerOpen guideWhy You Should Not Paste Secrets Into Online ToolsOpen guide

What JSON Formatter does

Use JSON Formatter when you need to pretty-print a compact API response before reading it.

When to use it

  • Pretty-print a compact API response before reading it.
  • Minify JSON before pasting it into a config field.
  • Sort keys when comparing small payloads by eye.

How to use it

  1. Paste JSON into the editor.
  2. Choose format or minify and optionally sort keys.
  3. Copy the valid output or fix the reported syntax error.

What to check

  • Do not paste secrets or production tokens into browser tools.
  • Formatting validates syntax, not business meaning.

Data, formats, and limits

What stays on your device and what is sent

Runs in your browser. Input, settings, and results are not sent to Utilio servers.

Supported formats

This tool works with typed or generated values rather than uploaded files.

File limits and browser requirements

  • Use an up-to-date browser and check the result on the device where you will use it.

Known limits

  • This tool helps inspect or transform data, but it does not replace code review, security review, or production configuration checks.
  • Do not paste real secrets, tokens, or private keys into data you are not prepared to expose in the browser.

Troubleshooting

  • If validation fails, start with quotes, commas, brackets, whitespace, and input encoding.
  • If the result is unexpectedly empty, check the tool mode and a minimal example without extra fields.
  • Do not paste real tokens, passwords, or keys; use a test snippet with the same format for diagnosis.
All developer toolsPrivacy PolicyHow Utilio handles data

Common questions

What does Utilio receive?

Runs in your browser. Input, settings, and results are not sent to Utilio servers.

What is it useful for?

Use it when you need to pretty-print a compact API response before reading it. Start by pasting JSON into the editor.

Do I need an account?

No. You can use this tool without creating an account.

Can I use it on a phone?

Yes. The tool works in a mobile browser, though longer input or detailed results may be easier to review on a larger screen.

How do I get a reliable result?

Paste JSON into the editor. Then choose format or minify and optionally sort keys. Do not paste secrets or production tokens into browser tools.

Does Utilio use my input or results to train AI?

No. Utilio does not use files, pasted text, settings, generated values, or results from this tool to train AI models.