Code Formatter & Minifier – Free Online Beautify / Minify
Instantly format or minify JSON, HTML, CSS, JavaScript, and SQL in your browser. No server upload, no signup — paste your code and get clean results.
How to Use
Select language & mode
Choose the language (JSON, HTML, CSS, JS, SQL) and whether you want to beautify or minify.
Paste your code
Paste or type your code into the input panel on the left.
Copy or download
Click Beautify or Minify, then copy the result to clipboard or download the file.
Why Use Our Tool?
5 languages in one tool
Format JSON, HTML, CSS, JavaScript, and SQL without switching tools.
Size savings display
Minify mode shows exactly how much smaller your code became.
100% client-side
Your code never leaves your browser — no server, no logs.
Swap input ⇄ output
Easily feed output back as input for chained operations.
Frequently Asked Questions
Which languages does the formatter support?
JSON, HTML, CSS, JavaScript, and SQL. Select the language from the dropdown before processing.
Is my code sent to a server?
No. All formatting and minification runs entirely in your browser. Your code is never uploaded anywhere.
How is JavaScript formatted?
The JS formatter applies basic brace-based indentation. For strict PEP/style-guide formatting, use Prettier locally — our tool is optimized for quick, dependency-free formatting.
What does minification do?
Minification removes whitespace, comments, and unnecessary characters to reduce file size for production. It shows the size savings percentage after processing.
Can I use the output as input again?
Yes — use the ⇄ Swap button to send the output back to the input field for further processing.