Ultimate ZIP Maker (Worker-friendly)

Worker-based zipping to reduce UI-freeze for large archives. No server/API needed.

Create ZIP

Tip: add files one-by-one or a few large files. Worker processes files sequentially to avoid memory spikes.

Selected files

No files selected

Progress

Idle

Developer notes

- Worker build: receives ArrayBuffers (or File metadata) and uses JSZip inside worker (importScripts).
- Files are read as ArrayBuffer in main thread and sent to worker sequentially (transferable if possible).
- Worker calls zip.file(name, arrayBuffer) per file, then generateAsync({type:'blob'}) when all added.
- Main receives final ArrayBuffer (transfered) and triggers saveAs.
- This reduces UI-blocking and reduces simultaneous memory usage compared to adding many files at once on main thread.