JSON Pretty Print – Readable JSON Formatter
Pretty print JSON with customizable indentation for maximum readability. Convert compact, hard-to-read JSON into clean, human-friendly formatted output instantly.
About JSON Pretty Print
Minified JSON is great for transmission but terrible for reading. This tool transforms compact, single-line JSON into a clean, indented format that's easy to scan and debug. Perfect for reviewing API responses or configuration files.
How it works
Paste your compact JSON and the tool parses it, then rebuilds it with proper indentation and line breaks. You control the indent size with options for 2, 4, or 8 spaces, or use tabs if preferred.
Enable the Sort Keys option to alphabetically order all object properties. This helps when comparing two JSON files or when you need consistent key ordering for documentation.
When you'd use this
You received a minified JSON response from an API and need to understand its structure. Instead of manually adding line breaks, paste it here and instantly get a readable version.
Keep in mind that pretty-printed JSON is larger in file size. Use the formatted version for development and debugging, but consider minifying again for production data transfer.
Questions
What indent size should I choose?
Two spaces is the most common convention in JavaScript and web development. Four spaces works well for printed documentation. Choose what matches your project's style guide.
Does sorting keys change the data?
No, the data remains identical. Only the order of keys within objects changes. Note that JSON object key order is technically not guaranteed, though most parsers preserve it.
Can this handle large JSON files?
Yes, but very large files may take a moment to process. For files over 10MB, consider using a desktop tool or command-line utility for better performance.
What if my JSON is invalid?
The tool will show an error message explaining the issue. Check for missing commas, unmatched brackets, or unquoted strings and try again.
Can I download the formatted JSON?
Yes. Click the Download button to save the pretty-printed JSON as a file, or use Copy to paste it directly into your editor.