Home › Tools › JSON Formatter

{ } JSON Formatter & Validator

Beautify, validate, minify, and explore JSON with a live tree view. Paste, upload a file, and copy or download the result — all free, no sign-up.

Paste JSON below and click Format, or start typing…

✏️ Input — Raw JSON

🖥 Output — Formatted / Tree

Output will appear here…

❌

How to Use

JSON Formatter — Feature Guide

✨

Format / Beautify

Paste any compressed or messy JSON and click Format. Choose 2, 4 spaces or Tab indentation. Syntax highlighting applied automatically.

⚡

Minify

Remove all whitespace to produce the most compact JSON possible — ideal for APIs, payloads, and storage.

✅

Validate

Instantly check if your JSON is syntactically valid. Errors show the exact line number and description.

🌲

Tree View

Switch to Tree View to explore large JSON interactively. Click any node to collapse or expand. Expand/Collapse All buttons available.

🔤

Sort Keys

Alphabetically sort all object keys — useful for diffs, comparisons, and standardising API responses.

📂

Upload & Download

Upload any .json file directly and download the formatted result. Works with large files too — all processing is done in your browser.

FAQ

Frequently Asked Questions

100% safe. All processing happens entirely in your browser using JavaScript. Your JSON is never sent to any server. You can even use this tool offline after the page has loaded.

JSON (JavaScript Object Notation) is a lightweight data-interchange format. It's easy for humans to read and write, and easy for machines to parse and generate. It is based on a subset of JavaScript and is the most widely used format for APIs and web services.

Format (Beautify) adds indentation and line breaks to make JSON human-readable. Minify does the opposite — removes all unnecessary whitespace to produce the smallest possible file size, which is ideal for sending JSON over APIs or storing it.

Common JSON errors include: trailing commas after the last item (not allowed in JSON), single quotes instead of double quotes, unquoted keys, and missing or extra brackets. The error bar shows the exact line and description to help you fix it quickly.