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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. 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 you can require() on every Node.js version, including 18 and older, is 15.0.12, published May 20, 2025.

On Node.js 20.19+, 22.12+ and every newer release, require("marked") works anyway: Node can load synchronous ES modules through require(). Verified on Node 20, 22, 24, 26. Node.js 18 and older still fail with ERR_REQUIRE_ESM.

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

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✓ works✓ works

How to import marked

ES modules (import)

import marked from "marked";

CommonJS (require)

// Node.js 20.19+ / 22.12+ / newer (package has no top-level await):
const marked = require("marked");

// Any Node.js version:
const marked = await import("marked");

// Or pin the last CommonJS release:
// npm install marked@15.0.12

Module format by version

Derived from the type, main and exports fields of every stable release on npm (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 you can require() on every Node.js version, including 18 and older, is 15.0.12, published May 20, 2025.

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

15.0.12 is the last version of marked with a CommonJS build. 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?

Use a dynamic import: const mod = await import("marked"). On Node.js 20.19+, 22.12+ and newer, a plain require("marked") also works for ESM packages that do not use top-level await. Alternatively pin marked@15.0.12.

Does marked work in Bun?

Yes. import "marked" loaded successfully in Bun 1.4 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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