What is JSON Formatter?
Turn compact or inconsistent JSON into readable formatted output, check syntax errors, or minify valid data.
Paste JSON and choose Format or Minify. The tool parses your input locally and shows a useful error when the JSON is invalid.
How to use this tool
- 1
Paste JSON into the input editor and choose the indentation style.
- 2
Format or validate the input; correct any syntax message if parsing fails.
- 3
Copy or download the readable result, or choose Minify for compact JSON.
Features
- Format with two or four spaces
- Validate JSON syntax with error details
- Minify and copy output locally
Example
{"name":"itotii","tools":["image","pdf"]} becomes indented, readable JSON.
Frequently asked questions
Is my JSON sent to a server?+
No. Parsing, validation and formatting run in your browser.
Which JSON syntax is accepted?+
The tool follows standard JavaScript JSON parsing. Comments and trailing commas are not valid JSON.
About this json formatter
JSON Formatter is part of itotii’s free collection of browser-based utilities. It is designed for a quick workflow: find the tool, complete the task and keep control of your files and data.
Output depends on your input and browser support. Review the result before using it in a published or important document.