JSON Formatter / Prettifier

What is a JSON Formatter?

A JSON Formatter is an essential tool for developers that takes messy, minified, or unformatted JSON code and transforms it into a clean, readable, and structured format. JSON (JavaScript Object Notation) is the standard for data exchange on the web, but it often arrives in a raw, compact state that is hard for humans to read.

Our tool strictly adheres to the JSON standard (RFC 8259), ensuring that your data is not only pretty but also valid. Whether you are debugging an API response, configuring a server, or just learning standard data formats, a reliable formatter is key to productivity.

Key Features

• Prettify JSON: Convert one-line strings into properly indented, multi-line blocks.
• Validate Syntax: Instantly detect errors like missing commas, unbalanced braces, or invalid types.
• Minify Code: Reverse the process to compress JSON for production use, saving bandwidth.
• Tree View: Visualize deep nesting structures with collapsible nodes.
• Secure Client-Side Processing: Your data never leaves your browser. We do not store or transmit your JSON.

How to Use

1. Paste your raw JSON string into the left-hand input editor.
2. The tool will automatically validate your input. If there are errors, they will be highlighted.
3. Click "Format" (usually automatic) to see the beautified version in the right-hand panel.
4. Use the toolbar to copy, download, or switch to Tree View for better analysis.

Frequently Asked Questions