JSON Formatter
Beautify, minify, validate, and explore JSON in a collapsible tree with copyable paths. Runs in your browser — your input never leaves your device.
Click a key or array index to copy its JSON path.
What is a JSON Formatter?
A JSON formatter makes raw JSON data easier to read by adding consistent indentation, line breaks, and spacing. It also validates that your JSON syntax is correct — highlighting errors before you use the data in your application.
Developers use JSON formatters when inspecting API responses, debugging configuration files, reviewing log output, or preparing data for documentation.
For deeply nested data, switch to Tree view to expand or collapse objects and arrays. Clicking a key or array index copies its exact JSON path, which is useful when tracing fields in API payloads and configuration files.
Beautify vs Minify vs Validate
Beautify
Adds indentation and line breaks to make JSON human-readable. Useful for inspecting data and writing documentation.
Minify
Removes all whitespace to produce the smallest possible JSON string. Useful for APIs and network transmission.
Validate
Checks syntax correctness. Reports the exact line and character position of errors like missing commas or unclosed brackets.
Common JSON Errors
- Missing comma between object properties or array elements
- Trailing comma after the last item (not valid in JSON, only in JavaScript)
- Unquoted property names — all keys must be double-quoted strings
- Single quotes instead of double quotes around strings
- Unclosed brackets
{or[ - Comments — JSON does not support
// comments
Specifications
- Accepts
- Text — type or paste
- Gives you
- .json download · copy to clipboard
- Where it runs
- Your browser — the file is never uploaded
- Sign-up
- None
- Cost
- Free, with no usage limits
FAQ
Is my JSON data sent to a server?
No. The formatter runs entirely in your browser using JavaScript. Your JSON data never leaves your device.
Can I format large JSON files?
Yes. The tool handles large JSON in the browser. Very large files (10 MB+) may take a moment depending on your device.
What indentation options are available?
You can choose 2-space, 4-space, or tab indentation to match your project code style.
Can I download the formatted JSON?
Yes. Use the Download button to save the formatted output as a .json file.
Can I view JSON as a tree and copy a JSON path?
Yes. Switch the output to Tree view to expand or collapse objects and arrays. Click any key or array index to copy its JSON path, such as $.settings.language or $.features[0].
Does the formatter support JSON5 or JSONC?
The formatter validates standard JSON (RFC 8259). Comments and trailing commas are not supported as they are not valid JSON.