JSON Formatter
Beautify, minify, and validate JSON data
Input JSON
Output
Frequently Asked Questions
What is JSON?
JSON is a lightweight data format used for data exchange between servers and web applications.
How to validate JSON?
Paste your JSON here. It automatically detects syntax errors and highlights the issue location.
Beautify vs minify?
Beautify adds indentation for readability. Minify removes whitespace to reduce file size for production.
What is the maximum size of a JSON file that browsers can handle?
Modern browsers can handle JSON files up to several hundred MB, but performance degrades above 50-100 MB. For very large JSON files, use streaming parsers or command-line tools like jq.
How do I fix 'Unexpected token' errors in JSON?
Common causes include trailing commas after the last item, single quotes instead of double quotes, unescaped special characters, or missing commas between items. Paste your JSON here to find the exact error location.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write, and easy for machines to parse and generate.
JSON is commonly used for transmitting data in web applications between a server and client.
JSON Syntax Rules
Objects: Enclosed in curly braces { } with key-value pairs.
Arrays: Enclosed in square brackets [ ] with comma-separated values.
Keys: Must be strings in double quotes.
Values: Can be strings, numbers, booleans, null, objects, or arrays.