What is JSON?
JSON (JavaScript Object Notation) is a lightweight, text-based data format built on key-value pairs and arrays. It is the most common format for exchanging data between web servers and applications, valued for being both human-readable and easy for machines to parse.
How to Use This JSON Formatter
- Paste your JSON into the input box.
- Choose your indentation — 2 spaces, 4 spaces, or tabs.
- Click Format / Beautify to pretty-print it, Minify to compress it, or Validate to check it for errors.
- Copy your result with the Copy Output button.
When Do You Need a JSON Formatter?
A JSON formatter is useful any time you're working with API responses, configuration files, or log output that arrives minified or inconsistently indented. Beautifying makes nested structures easy to read and debug, while minifying strips whitespace to reduce payload size before sending data over a network or storing it in a file.
Frequently Asked Questions
What is JSON?
JSON (JavaScript Object Notation) is a lightweight, text-based data format built on key-value pairs and arrays. It is the most common format for exchanging data between web servers and applications.
How to validate JSON?
Paste your JSON into the input box and click Validate. The tool attempts to parse it and reports either a success badge or the exact error and approximate line number if the JSON is malformed.
JSON vs XML?
JSON is more compact and maps directly to native data structures in most programming languages, making it faster to parse. XML supports attributes, namespaces, and document-style markup, which makes it better suited to complex document formats.
What causes JSON parse errors?
Common causes include trailing commas, missing or extra commas, unquoted keys, single quotes instead of double quotes, and unescaped special characters inside strings.