File and security tools that keep files on your device
Create and open ZIP files, rename many files at once and verify downloads with SHA-256 checksums. Everything happens in your browser: nothing is uploaded.
- No uploads
- No sign-up
- No cookies or trackers
- Works offline
4 file and security tools
Every tool runs in your browser. Pick one to start.
Everyday file jobs, done privately
Zipping a folder of tax papers, opening an archive from a client, checking that a download was not changed: these are everyday jobs, and none of them need a server. These tools use your browser's built-in compression and cryptography, so your files stay with you.
Questions
Are my files uploaded?
No. Every tool here runs inside your browser. Your files are read and written on your own device.
How large can my files be?
It depends on your device memory. Most tools handle files of several hundred megabytes on a modern computer.
Why check a SHA-256 checksum?
It proves a download is exactly the file the publisher released, without damage or tampering. Compare the checksum you get with the one on the publisher's website.