JSON Pretty Print
Paste any JSON to format it with custom indentation. Live validation included.
Output appears here
What is a JSON Formatter?
A JSON formatter (also called a JSON pretty printer or beautifier) takes minified or raw JSON and adds consistent indentation and line breaks so the structure is easy to read. Pasting a wall of compact JSON into this tool instantly turns it into a neatly indented document.
Encoder.guru's formatter runs 100% in your browser — nothing you paste is ever sent to a server. It validates JSON as you type, highlights syntax errors with the character position, and supports 2-space, 4-space, tab, and minified output modes.
How to format JSON online
- Paste your raw or minified JSON into the Input box.
- Choose your indent style (2 spaces, 4 spaces, tab, or minified).
- The formatted output appears instantly in the Output panel.
- Toggle Sort keys to alphabetise all object keys recursively.
- Click Copy or Save to use the result.
Frequently Asked Questions
What is the difference between JSON Pretty Print and JSON Minify?
Pretty Print adds indentation and newlines to make JSON human-readable. Minify strips all whitespace to produce the smallest possible string, which is better for network transmission.
Can I format large JSON files?
Yes. The tool runs entirely in your browser using the native JavaScript JSON.parse engine, so it can handle large files without any server upload. Files over 10 MB may take a couple of seconds.
Does the formatter validate my JSON?
Yes. Any syntax error causes the tool to show a red status badge with a description of the problem and the character position, so you can fix it quickly.
Is this JSON formatter free?
Completely free, with no signup, no usage limits, and no data ever leaving your device. Your JSON is processed locally using your browser's built-in JavaScript engine.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight text format for storing and transporting data. It is the de-facto standard for REST API responses and configuration files.