fast-crc32 Installation npm install fast-crc32 --save Usage const crc32 = require('fast-crc32'), http = require('http'); http.get('http://example.com', response => crc32.calculateFromStream(response) .then(checksum => console.log('CRC32C: ' + checksum.toString(16))) .catch(error => console.error('Unable to calculate CRC32C', error)));