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Is multer ESM-only? Can you require() it?

Middleware for handling `multipart/form-data`.

Last verified Sep 9, 2026 against multer@2.3.0. Markdown · JSON

CommonJS CommonJS — require() works on every Node.js version we test

multer ships CommonJS only. require("multer") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 10.16.0. import "multer" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

What to do

  1. require("multer") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 10.16.0.
  2. From ES modules use the default import: import multer from "multer"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: npm install -D @types/multer
Latest
2.3.0 (Aug 28, 2026)
Module format
CommonJS
Last CommonJS version
2.3.0
TypeScript types
@types/multer
Node engines
>= 10.16.0
Weekly downloads
14.9M
License
MIT

Does multer@2.3.0 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("multer") from a CommonJS file and import "multer" from an ES module.

Runtimerequire("multer")import "multer"
Node.js 18✓ works✓ works
Node.js 20✓ works✓ works
Node.js 22✓ works✓ works
Node.js 24✓ works✓ works
Node.js 26✓ works✓ works
Bun 1.4.0✓ works✓ works

How to import multer

ES modules (import)

import multer from "multer";

Named imports from a CommonJS package only work when Node.js can statically detect them. If a named import fails, use the default import and destructure.

CommonJS (require)

const multer = require("multer");

Module format by version

Derived from the type, main and exports fields of every stable release on npm, corrected where a runtime test of that version contradicted them (39 versions; the newest 39 shown).

VersionsFormatFirst published
0.0.1 – 2.3.0CommonJSFeb 1, 2014

Frequently asked

Is multer ESM-only?

multer@2.3.0 is a CommonJS package. multer ships CommonJS only. require("multer") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 10.16.0. import "multer" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

Can I import multer with ES module syntax?

Yes. import multer from "multer" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.

Does multer work in Bun?

Yes. import "multer" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does multer ship TypeScript types?

Not bundled. Install the community types with "npm install -D @types/multer".

Links

Other commonjs packages

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