`os.arch()`

Returns the CPU architecture Node was compiled for.

Since Node 0.5 Spec ↗

Syntax

os.arch()

string — e.g. 'x64', 'arm64', 'ia32'.

import { arch } from 'node:os';

console.log(arch());

Output

arm64

import { arch, platform } from 'node:os';

console.log(`${platform()}-${arch()}`);

Output

darwin-arm64

Reflects the Node binary's architecture, equal to `process.arch`. Useful for selecting prebuilt native binaries or downloads.