Ziply

Fast JavaScript ZIP utilities focused on appending files without unpacking or recompressing the whole archive.

import { augmentZipWithFile, createZip } from "ziply";

const zip = createZip([{ name: "hello.txt", data: "hello" }]);

const next = await augmentZipWithFile(zip, "upload.yml", "true", {
  onDuplicate: "replace"
});

Highlights:

• Create stored ZIP archives.
• Append stored entries to existing archives.
• Read central directory metadata.
• Extract stored entries with CRC verification.
• Browser Blob and File support.
• Fast table-driven CRC32.

Full docs and roadmap: https://github.com/eklavya-raj/ziply