JSON Formatter & Validator

Validate, beautify, minify, and consistently sort JSON data.

Runs locally in your browser

IndentSort object keysMinify

Valid JSON

JSON input134 characters

Formatted output

{ "project": "dev-tools", "private": true, "scripts": { "test": "vitest run", "build": "tsc -b && vite build" }, "features": [ "diff", "json", "xml" ] }

Complete tool guide

JSON Formatter & Validator guide

This tool parses JSON with the browser's standards-compliant parser, reports syntax errors, and serializes valid values with your chosen formatting.

Your input is processed in the current browser tab and is not sent to the application server.

Why use this tool?

Inspect or transform developer data without installing another utility.
Copy a clean result directly into code, a terminal, an API client, or documentation.
Keep routine developer work in one fast, consistent interface.

Common use cases

Making compact API responses readable
Checking configuration or request payload syntax
Normalizing object key order for easier review

How to use it

1
Paste or type JSON in the input editor.
2
Read the validation status and fix any syntax errors.
3
Choose indentation, sorted keys, or minification.
4
Copy or download the processed JSON.

Strict JSON

Property names and strings require double quotes. Comments, trailing commas, NaN, and undefined are not part of JSON.

Sorted keys

Sorting is applied recursively to objects while array order is preserved.

Minification

Minifying removes insignificant whitespace without changing the represented JSON value.

Practical tips for better results

Do not paste live credentials or tokens into shared devices.
Use sorted keys for review, but preserve intentional ordering when consumers display keys as entered.
Validate against a JSON Schema separately when field-level rules matter.

Frequently asked questions

Does the JSON Formatter & Validator upload my data?

No. The transformation runs locally in your browser. Avoid pasting secrets into any tool you do not control, and clear the fields when using a shared device.

Can I use the result in production?

You can copy or download the result, but review it in the context of your application and run the project-specific tests or validation required by your workflow.

Keep working

Continue with another focused tool from the same collection.

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