How to Format JSON Code
Learn how to format JSON code step by step. Pretty-print minified JSON, validate syntax, and make your data readable.
JSON (JavaScript Object Notation) is the standard data format for web APIs and configuration files. When JSON is minified — compressed into a single line with no whitespace — it becomes difficult to read and debug. Formatting JSON makes it human-readable by adding proper indentation, line breaks, and spacing. Here is how to format JSON quickly and accurately.
Why Format JSON?
Formatted JSON is essential for debugging API responses, reviewing configuration files, sharing data with teammates, and preparing documentation. Minified JSON is optimized for machines, but formatted JSON is optimized for humans. Most development workflows require formatted JSON at some point.
Methods for Formatting JSON
There are several ways to format JSON. Browser-based tools like Tool Elixir require no installation and process your data locally. Code editors like VS Code have built-in formatting shortcuts. Command-line tools like jq can format JSON in terminal workflows. Each method has its advantages depending on your context.
Common Formatting Options
When formatting JSON, you can typically choose indentation depth (2 spaces is the most common convention, 4 spaces is also popular), whether to sort object keys alphabetically, and whether to preserve or remove trailing commas. Consistent formatting across your project makes collaboration easier.
Step-by-Step Instructions
1Copy your minified JSON
Select and copy the JSON data you want to format. This could be from an API response, a configuration file, or any source that provides JSON data.
2Open a JSON formatter
Navigate to Tool Elixir's JSON formatter tool in your browser. No installation or account is required — the tool runs entirely in your browser.
3Paste your JSON data
Paste the copied JSON into the input area. The tool will automatically detect and parse the JSON, highlighting any syntax errors immediately.
4Review the formatted output
The formatter instantly produces clean, indented JSON. Check the output to confirm the structure looks correct and the data is properly nested.
5Copy the formatted result
Click the copy button to copy the formatted JSON to your clipboard. You can now paste it into your editor, documentation, or wherever you need it.
Tips and Tricks
- •Use 2-space indentation for consistency with most JavaScript and TypeScript projects.
- •If your JSON has syntax errors, the formatter will highlight exactly where the problem is.
- •For bulk formatting, many editors support format-on-save for JSON files.
- •Always validate JSON before sharing it — malformed JSON can break applications.