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Transpile modern JavaScript syntax to broad ES5-compatible output using browser-side transpilation.
All JavaScript processing runs locally in your browser. No code uploads.
Modern JavaScript syntax can break in older browsers and some server environments. The ES6 to ES5 Converter transpiles arrow functions, destructuring, spread operators, template literals, and class syntax to universally compatible ES5 code.
Transpilation converts syntax. Runtime APIs like Promise, fetch, and Array.from still need polyfills for environments that predate them.
Arrow functions, destructuring, template literals, spread/rest operators, classes, let/const, and default parameters.
No. Transpilation converts syntax. Runtime APIs like Promise or fetch still need polyfills separately.
For public-facing code targeting all browser versions, yes. For internal tools with known modern environments, often not needed.
Check out our technical guides to learn more about how browser-side processing works.
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