JavaScript Formatter
Format, minify, and validate JavaScript online for free, right in your browser.
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LanguageFor JS / JSX
JSinput.js
Indent
⌘⏎Quick format
InputEditable
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OutputJavaScript valid10 lines · 194 B
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/*! format-codes v1.0 | MIT license */
// sum two numbers
function sum(a, b) {
return a + b;
}
const greet = (name) => `Hello, ${name}!`;
console.log(sum(2, 3));
console.log(greet("world"));
UTF-8 · Indent: 2 spaces · Auto wrap: onLocal processing · Ready
How It WorksJavaScript
Overview
This JavaScript formatter turns minified or inconsistently indented code into clean, readable code with consistent indentation, or minifies it down to the smallest size. It's built on a real JavaScript parser, so strings, template literals, and regular expressions are correctly recognized and never get broken; minifying doesn't rename variables or apply aggressive mangling by default. Everything runs locally in your browser; your data never leaves your device.
Use Cases
Clean up minified script source codeUnify a team's code indentation styleMinify JavaScript for production releaseCheck a script for syntax errors
Steps
123
Paste or uploadSet optionsGet the result