JSON Formatter & Validator - Free Local Tool
Free online JSON formatter and validator. Beautify, minify, and validate JSON data. 100% client-side processing - your data never leaves your browser.
Frequently asked questions
No. Parsing and formatting run only in this tab. Nothing is sent to LocalTools servers for processing.
The tool reports parse errors from the browser’s JSON parser; when valid, you can format, minify, copy, or download the result locally.