JSON Formatter & Pretty Printer

JSON is the most common data format for APIs, configuration files, and storage. When it arrives minified on a single line, it is hard to read: nested objects blur together and syntax mistakes are easy to miss. A JSON formatter (also called a JSON pretty printer or beautifier) reformats the data so every key, array, and value sits on its own readable line.

{"name":"John","age":30,"roles":["admin","dev"]}

{
  "name": "John",
  "age": 30,
  "roles": [
    "admin",
    "dev"
  ]
}

• Paste your compact JSON, or type it directly into the editor above.
• The JSON is detected automatically and pretty-printed with 2-space indentation.
• Copy the result, download it as a file, or share it as a link.
• Switch tools in the toolbar to minify the JSON or validate it instead.

All three live in this one workspace. If you're unsure where to start, run the validator first — once the syntax is confirmed valid, formatting and minifying are safe.

• ◆Toggle Split view to keep raw input on the left and formatted output on the right while editing.
• ◆Turn on word wrap in Editor settings when long string values stretch past the screen edge.
• ◆Use search inside the editor to find a specific key in deeply nested documents.
• ◆Made a mistake? Restore Original brings back exactly what you pasted, before any formatting.

Pretty-printing

Adding whitespace, indentation and line breaks to serialized data so it is easier for humans to read. Pretty-printed JSON parses to exactly the same values as the compact form — only presentation changes.

Serialization

Converting an in-memory object into a transferable text format. JSON serialization turns language objects into strings; formatting controls how those strings are laid out for readers.