Create ZIP

How it works

This tool builds a ZIP archive directly inside your browser tab — no server, no upload, no waiting. Drop or pick individual files, or use "Add folder" to add an entire folder's contents at once with its structure preserved, then choose a compression level and create the archive.

Compression happens in a background Web Worker so the page stays responsive even for a large batch of files. "Fast" trades some file size for near-instant compression; "Smallest" spends more time to squeeze out extra space, most noticeable on text-heavy files like source code or logs — already-compressed formats (JPG, MP4, existing ZIPs) barely shrink further regardless of level, since there's little redundancy left for any ZIP compressor to find.

Limitations

There's no built-in size limit, but very large batches are ultimately bounded by your browser's available memory, since everything is held and compressed in memory rather than streamed to disk.

FAQ

Is this ZIP creator really free?

Yes — completely free, with no file size limits and no account required. The archive is built entirely in your browser, so there's no server cost to recoup.

Can I add a whole folder, not just individual files?

Yes — use "Add folder" to pick an entire folder (with your browser's folder picker); its contents are added preserving the folder structure inside the resulting ZIP, exactly as if you'd zipped it with a desktop file manager.

What does the compression level change?

Fast produces a slightly larger file but compresses almost instantly; Smallest spends more time squeezing out extra space, most noticeable on text-heavy files; Balanced is a reasonable middle ground for most cases. Already-compressed files (JPG, MP4, ZIP) won't shrink much no matter which level you pick — that's inherent to how they're already encoded, not a limitation of this tool.

Is my data uploaded anywhere?

No — every file you add is read and compressed directly in your browser. Nothing is ever sent over the network.