JSON Formatter & Validator

Format, beautify, validate, and minify JSON instantly. Sort keys, escape strings, and download your result. Everything runs in your browser — no data sent anywhere.

Paste JSON on the left to get started
📥 Input 0 chars · 0 lines
📤 Output 0 chars · 0 lines
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How to Use the JSON Formatter

  1. Paste or upload JSON — use the left editor or click 📁 to upload a file.
  2. Choose an action — Format, Minify, Validate, Sort Keys, Escape, or Unescape.
  3. View the result — the formatted output appears in the right panel.
  4. Copy or download — use 📋 to copy or ⬇️ to download the result.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight, text-based format for storing and exchanging data. It's the standard format for APIs, configuration files, and modern web applications.

A valid JSON document contains either an object or an array at the top level. All strings must use double quotes, and trailing commas are not allowed.

Frequently Asked Questions

Is my JSON sent to a server?

No. All parsing, formatting, and validation happens entirely in your browser using JavaScript. Your data never leaves your device.

What's the difference between Format and Minify?

Format adds indentation and line breaks to make JSON human-readable. Minify removes all unnecessary whitespace to make the output as small as possible.

What does "Sort Keys" do?

Sort Keys reorders object properties alphabetically. Useful for comparing two JSON files and for consistent hashing.

What is "Escape" for?

Escape converts JSON into a single-line string that can be embedded inside another JSON field. Unescape does the reverse.

Can it handle large JSON files?

Yes, but very large files (over 10 MB) may take a moment to parse. There's no hard limit.

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