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

A markdown parser built for speed

Last verified Sep 9, 2026 against marked@18.0.12. Markdown · JSON

ESM-only ESM-only since 16.0.0 — last CommonJS version is 15.0.12

marked dropped its CommonJS build in 16.0.0 (June 2025). The last version with a plain require()-able CommonJS entry is 15.0.12, published May 20, 2025; it declares support for Node.js >= 18.

On Node.js 20.19+, 22.12+ and newer, require("marked") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. Node.js 18 has no require(esm), and marked@18.0.12 declares Node.js >= 20, so 18 is outside its supported range anyway.

marked@18.0.12 declares engines ">= 20", so Node.js 18 is outside its supported range regardless of module format.

What to do

  1. On Node.js 20.19+, 22.12+ and newer, require("marked") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26.
  2. From a CommonJS file, use a dynamic import inside an async function: const marked = await import("marked"). That works on every Node.js version the package supports (>= 20).
  3. If you need a synchronous require() or run Node.js 18: npm install marked@15.0.12, the last CommonJS release (published May 20, 2025); it declares Node.js >= 18.
  4. marked@18.0.12 declares engines ">= 20", so Node.js 18 is unsupported regardless: upgrade Node.js or pin an older release.
  5. TypeScript: types are bundled; install nothing extra.
Latest
18.0.12 (Sep 7, 2026)
Module format
ESM-only
Last CommonJS version
15.0.12
ESM-only since
16.0.0 (Jun 27, 2025)
TypeScript types
Bundled
Node engines
>= 20
Weekly downloads
67.0M
License
MIT

Does marked@18.0.12 actually load? Runtime test results

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

Runtimerequire("marked")import "marked"
Node.js 18✗ failsERR_REQUIRE_ESM✓ 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 marked

ES modules (import)

import * as marked from "marked";

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS (require)

// Node.js 20.19+, 22.12+ and newer (verified):
const marked = require("marked");

// Any Node.js version the package supports (>= 20), from an async function:
async function main() {
  const marked = await import("marked");
}

// Or pin the last CommonJS release (declares Node.js >= 18):
// npm install marked@15.0.12

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 (221 versions; the newest 60 shown).

VersionsFormatFirst published
16.0.0 – 18.0.12ESM-onlyJun 27, 2025
11.0.1 – 15.0.12Dual (CommonJS + ESM)Dec 8, 2023

Frequently asked

Is marked ESM-only?

marked@18.0.12 is ESM-only. marked dropped its CommonJS build in 16.0.0 (June 2025). The last version with a plain require()-able CommonJS entry is 15.0.12, published May 20, 2025; it declares support for Node.js >= 18.

Which version of marked still supports CommonJS / require()?

15.0.12 is the last version of marked with a CommonJS build; it declares Node.js >= 18. Install it with "npm install marked@15.0.12". Every version from 16.0.0 on is ESM-only.

How do I use marked from a CommonJS file?

From a CommonJS file, use a dynamic import inside an async function: const marked = await import("marked"). That works on every Node.js version the package supports (>= 20). On Node.js 20.19+, 22.12+ and newer, require("marked") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. Alternatively pin marked@15.0.12 (declares Node.js >= 18).

Does marked work in Bun?

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

Does marked ship TypeScript types?

Yes. marked bundles its own type declarations; no @types package is needed.

Links

Other esm-only packages

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