Create and Extract ZIP Files Without Uploading Anything
BigWow's Zip Tool uses JSZip compiled to run in your browser's JavaScript engine. Compression and extraction happen entirely in local memory — ideal for securely bundling confidential documents without cloud exposure.
0 bytes of file data uploaded to any external server.
Compresses and bundles multiple files into a single ZIP locally.
Extraction previews file list before writing to local Downloads folder.
Frequently Asked Questions
Can I zip files containing passwords or private keys?
Yes. Since no data is uploaded, you can safely zip sensitive files. The ZIP is created in browser memory and downloaded directly to your device.
Does this tool support password-protected ZIPs?
BigWow supports AES-encrypted ZIP archives locally using the JSZip library's encryption extension.
Sources & References
- PKWARE .ZIP Application Note defining the ZIP file format specification.
- W3C Streams API specification for efficient in-browser binary data processing.
Try it now — 100% free, zero upload
No account, no ads, no file size limits. Opens instantly in your browser.