crypto

Last updated Oct 17, 2026 Note

For compatibility dates of 2026-08-04 or later, Workers enables both nodejs_compat and nodejs_compat_v2 by default. These flags are not used for these compatibility dates. Existing projects do not need to remove them when updating their compatibility date. For earlier dates, add nodejs_compat to your Wrangler configuration file to opt in. For instructions to turn off Node.js compatibility, refer to the Node.js compatibility flag.

The node:crypto ↗︎ module provides cryptographic functionality that includes a set of wrappers for OpenSSL's hash, HMAC, cipher, decipher, sign, and verify functions.

All node:crypto APIs are fully supported in Workers with the following exceptions:

The full node:crypto API is documented in the Node.js documentation for node:crypto ↗︎.

The WebCrypto API is also available within Cloudflare Workers. This does not require the nodejs_compat compatibility flag.

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description: Use the Node.js diagnostics_channel API in Cloudflare Workers for low-overhead diagnostic event reporting. title: Diagnostics Channel image: https://developers.cloudflare.com/workers/runtime-apis/nodejs/diagnostics-channel/og.png?v=4d13bc0811ae2bfc

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