JSON Formatter
Beautify, minify and validate JSON instantly online.
① Paste your JSON in the editor ② Click Format to validate and prettify ③ Copy the result
JSON Syntax
object / array / string / number / bool / null
Beautify vs Minify
Readability vs performance — choose your use case
Validation
Detects trailing commas, missing quotes, wrong types
What is JSON Formatting and Why Does It Matter?
JSON (JavaScript Object Notation) is a lightweight data-interchange format. Formatting JSON improves readability for developers and makes debugging API responses easier. Minified JSON reduces file size for production use. This tool supports beautify, minify and validation modes.
Frequently Asked Questions
JSON is a text format for data exchange used in APIs, config files and web apps. Formatting adds indentation and line breaks to make the structure human-readable.
Beautify parses the JSON and re-serializes it with configurable indentation (2 or 4 spaces) and newlines between each key-value pair.
Beautify makes JSON readable for humans. Minify removes all whitespace to reduce file size — useful for production API payloads.
The tool uses JSON.parse() internally. Any invalid JSON throws an error with the position of the mistake, shown in the error message.
JSON is invalid when it contains trailing commas, single-quoted strings, comments, or undefined values. Only strict JSON (RFC 8259) is supported.
Developers use JSON formatting to debug API responses, clean up config files, prepare data for logging systems, and share readable snippets in documentation.
No. This tool supports only standard JSON (RFC 8259). JSON5 (comments, trailing commas) and JSONC (VS Code-style comments) are not supported.