JSON Formatter

Free online JSON formatter, validator, and prettifier. Format, validate, and beautify JSON data with configurable indentation and key sorting. Instant results.

JSONPopular
Input
Ready
Output
—
You might also like
HTML Formatter
Free online HTML formatter and beautifier. Instantly pretty-print, indent, and clean up messy HTML code. No installation required — runs entirely in your browser.
HTMLPopular
CSS Formatter
Free online CSS, SCSS, and Less formatter and beautifier. Instantly pretty-print stylesheets with configurable indentation. No sign-up needed — runs in browser.
CSSSCSSPopular
JavaScript Formatter
Free online JavaScript and TypeScript formatter. Beautify ES6+, JSX, and TSX code with Prettier-style formatting. No install needed — instant in-browser formatting.
JavaScriptTypeScriptPopular
SQL Formatter
Free online SQL formatter for MySQL, PostgreSQL, T-SQL, and PL/SQL. Instantly beautify and indent SQL queries for maximum readability. No sign-up required.
SQLPostgreSQL
Frequently Asked Questions
What does a JSON formatter do?
A JSON formatter (beautifier) adds proper indentation and line breaks to JSON data, making it easy to read. It also validates JSON syntax and reports errors.
Can it validate JSON?
Yes. The formatter validates your JSON as you type and shows detailed error messages with line numbers.
Can I sort JSON keys alphabetically?
Yes. There is an option to sort all JSON object keys alphabetically for consistent output.