Free JavaScript Tools: Format, Minify, Convert

All javascript tools

JSON to JS Object

Convert JSON data to JavaScript object literal syntax with proper formatting and structure
JS Object to JSON

Convert JavaScript object literals to valid JSON format with proper escaping and structure
JavaScript Formatter

Beautify and format JavaScript code with proper indentation and structure for better readability
JavaScript Minifier

Minify JavaScript by removing whitespace, comments, and shortening variable names to reduce file size
JS Import Sorter

Sort and group ES module import statements alphabetically, separating external packages from internal relative imports
JS to TypeScript

Add TypeScript type annotations to JavaScript functions for better type safety and IDE support
CommonJS ⇄ ESM Converter

Convert CommonJS require and module.exports to ES module import/export syntax and back for the common static patterns
ES6 to ES5 Converter

Convert modern ES6+ arrow functions and syntax to ES5-compatible JavaScript for legacy browsers
JS Regex Escaper

Escape a literal string so its special characters are matched literally inside a RegExp, with optional forward-slash escaping
JS Unicode Escaper

Escape non-ASCII characters to \\uXXXX sequences so source stays ASCII-safe, or decode \\uXXXX, \\u{...} and \\xXX back to text
Template Literal → Concat

Convert ES6 template literals with ${expr} interpolation into equivalent string concatenation, string and regex aware
Ternary to If/Else

Expand ternary assignments, declarations and returns into readable if/else blocks, safely skipping ?? and ?. operators
var to let / const

Replace the var keyword with let or const across your code, string, comment and regex aware so text like \
Console.log Remover

Strip console.log, warn, error, info and debug statements from JavaScript without touching strings, comments or regex
JavaScript Validator

Validate JavaScript syntax and find errors with detailed line numbers and error messages
JS Console Simulator

Simulate JavaScript console.log output for code snippets and preview execution results
JS Variable Name Validator

Check whether a name is a valid JavaScript identifier and explain each problem — digits, symbols, spaces or reserved keywords
JavaScript Obfuscator

Basic JavaScript obfuscation with variable renaming and string encoding to protect code
JS Comment Remover

Remove line and block comments from JavaScript while preserving URLs and comment syntax inside strings, with optional JSDoc keep
JS Quote Normalizer

Convert JavaScript string quotes between single and double, string, comment and regex aware, re-escaping quotes as needed
List to JS Array

Turn a list of lines, comma or space separated values into a JavaScript array literal with quoting, trimming and de-duplication

About JavaScript Tools

These 24 JavaScript tools help you clean, check and transform scripts. The JS Formatter uses Prettier to lay out code consistently, the JS Minifier shrinks it, and the JS Validator reports syntax errors with their position. Transform tools convert ES6 to ES5, CommonJS to ES modules, var to let and const, and plain JavaScript to a TypeScript starting point, and they can remove console calls or comments before you ship.

The JS Console Simulator runs a snippet and shows what console.log prints. Your code runs inside a sandboxed frame with its own worker, cut off from the page, cookies and storage, so an infinite loop cannot freeze the site. Small helpers escape strings and regular expressions, sort object keys and normalise quotes. Like every tool here, nothing is uploaded, which is useful when the code is not yet public.

Frequently asked questions

Is the JavaScript obfuscator secure?

No obfuscation is secure. It makes code harder to read, but anyone determined can reverse it. Never put secrets in client-side code.

Does ES6 to ES5 add polyfills?

It rewrites syntax such as arrow functions, classes and template literals. Features that need runtime support, like Promise in very old browsers, still need a polyfill.

Can the console simulator access my page or cookies?

No. Code runs in an isolated sandbox with no access to the site, your cookies or local storage.

JavaScript Tools

Start here

JavaScript Minifier

JavaScript Formatter

JavaScript Obfuscator

JS to TypeScript

JSON to JS Object

CommonJS ⇄ ESM Converter

Console.log Remover

All javascript tools

JSON to JS Object

JS Object to JSON

JavaScript Formatter

JavaScript Minifier

JS Import Sorter

JS to TypeScript

CommonJS ⇄ ESM Converter

ES6 to ES5 Converter

JS Regex Escaper

JS Unicode Escaper

Template Literal → Concat

Ternary to If/Else

var to let / const

Console.log Remover

JavaScript Validator

JS Console Simulator

JS Variable Name Validator

JavaScript Obfuscator

JS Comment Remover

JS Quote Normalizer

List to JS Array

About JavaScript Tools

Frequently asked questions

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