A JSON formatter parses valid JSON and adds consistent indentation and line breaks so objects and arrays are easier to read. This tool can also validate, minify, and sort object keys.
Developer Tool
JSON Formatter & Validator
Paste JSON to validate its syntax, format it with readable indentation, minify it for compact storage, sort object keys, and download the result. Processing happens locally in your browser.
- Instant results
- Mobile friendly
- Free to use
Private browser-side developer tool
Local processing
Format and validate JSON
JSON stays in this browser tab and is not submitted to the ProwessApps server.
Input JSON
0 characters · 0 bytesOutput JSON
Waiting for valid JSON
Ready
Paste JSON, open a local file, or load the sample to begin.
Structure analysis
JSON statistics
—Root type
0Object keys
0Values
0Maximum depth
0Output lines
0 BOutput size
Ctrl + Enter Format
Ctrl + Shift + M Minify
Simple instructions
How to use the JSON Formatter & Validator
Follow these steps to get a clear result.
- 1
Paste JSON into the input editor or load a local .json or .txt file.
- 2
Choose the indentation style and whether object keys should be sorted.
- 3
Select Format JSON, Validate, or Minify depending on the required result.
- 4
Review any syntax error details, then copy or download the valid output.
Frequently asked questions
JSON Formatter & Validator FAQ
No. Formatting, validation, statistics, copying, and file generation are performed locally by JavaScript in the browser. Avoid pasting secrets into any tool unless organizational policy permits it.
Common causes include trailing commas, single-quoted strings, missing commas, unquoted property names, invalid escape characters, comments, or unmatched braces and brackets. Strict JSON requires double quotes and does not allow comments.
Formatting adds whitespace and indentation for readability. Minifying removes unnecessary whitespace to create a compact representation while preserving the same JSON data.
Sorting changes the display order of object properties recursively but does not change values or array order. Applications should not rely on object property order for data meaning.
