How ZIP Creation Works
AnyTool creates ZIP archives using JSZip, a pure-JavaScript ZIP implementation. Files are read as ArrayBuffers and added to the archive in-memory. Optional AES-256 password encryption is supported for sensitive files.
How to create a ZIP file online?
Drop your files onto AnyTool ZIP Maker, optionally set a password, and click Create ZIP. The archive is built locally in your browser using JSZip — no files are uploaded.