CommonJS ⇄ ESM Converter — Free Online Tool

Convert CommonJS require and module.exports to ES module import/export syntax and back for the common static patterns. CommonJS ⇄ ESM Converter is a free online tool from the ToolsRift JavaScript Tools collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.

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How to use CommonJS ⇄ ESM Converter

Choose the conversion direction, paste your module code, then click Convert. Review the output — static require/import patterns are converted automatically.

Frequently asked questions

Which patterns are converted?

Default (const x = require('y')), named (const { a } = require('y')), side-effect (require('y')), module.exports and exports.foo — and the reverse import/export forms for ESM to CommonJS.

Does it convert dynamic require()?

No. Only static, top-level patterns are converted. Dynamic or conditional require() calls, re-exports (export ... from) and mixed default+named imports are left unchanged.

Is the output ready to run?

It handles the common cases but is a static text transform, not a bundler. Review edge cases such as interop defaults and mixed imports before shipping.

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