File tools

Zip, unzip, split, hash, and encrypt files of any type — entirely on your own device.

Create ZIP archives with adjustable compression, browse and extract ZIPs without unpacking everything, split large files into email-sized chunks with reassembly instructions included, compute SHA-256 checksums to verify downloads, and encrypt any file with AES-256-GCM and a passphrase. These are the tools where local processing matters most: you'd never email a file to a stranger just to zip it, yet that's effectively what upload-based tools ask you to do. Here the bytes never leave your machine — JSZip and the Web Crypto API do the work in your browser. No upload, no signup, no size limits beyond your device's memory.

Every files & data tool

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Drop your file here

or click to browse

All files • or paste with ⌘V

Nothing has left this page since you opened the tool. Show network activity

The browser enforces this: the site’s security policy only lets the page talk to the code libraries’ servers and an anonymous usage counter (tool name, file type, size range). A request carrying your file to anywhere else would be blocked before it left.

Check it yourself: open your browser’s developer tools, go to the Network tab, and run the tool. Or turn off Wi-Fi once the tool has loaded; it keeps working.

Every files & data tool

Drop your file here

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