Detect the archive type of a Buffer/Uint8Array

npm install @xhmikosr/archive-type

import archiveType from '@xhmikosr/archive-type';
import {readChunk} from 'read-chunk';

const buffer = await readChunk('unicorn.zip', 0, 262);

await archiveType(buffer);
//=> {ext: 'zip', mime: 'application/zip'}

Returns an Object with:

• ext - One of the supported file types
• mime - The MIME type

Or null when no match.

Type: Buffer Uint8Array

It only needs the first 262 bytes.

• 7z
• bz2
• gz
• rar
• tar
• zip
• xz
• gz
• zst

• archive-type-cli - CLI for this module

MIT © Kevin Mårtensson