Encrypt a ZIP File
Protect an Archive With a Password
Need to use Encrypt a ZIP File right now?
Remember the password — there's no recovery option once the archive is encrypted.
Add files to protect
Processed locally in your browser — never uploaded
Encrypts with AES-256, ZIP's strongest standard encryption — a real 7-Zip build compiled to WebAssembly does the encryption entirely in your browser. Remember the password: it can't be recovered if lost.
Features
- Runs entirely in your browser
- Privacy-first — your data is never uploaded
- Real-time, instant results
- 100% free, no sign-up required
- Works on desktop, tablet, and mobile
- No installation needed
Who uses this tool?
About Encrypt a ZIP File
Sharing sensitive files sometimes calls for genuine encryption, not just an informal agreement not to peek. This tool bundles your files into a ZIP archive protected with AES-256 — ZIP's strongest standard encryption method — using a real 7-Zip build compiled to WebAssembly to perform the actual encryption.
AES-256 is a modern, cryptographically strong encryption standard, meaningfully stronger than the older, legacy ZipCrypto method many casual ZIP tools default to (which has known weaknesses). Choosing AES-256 specifically is a deliberate security choice this tool makes on your behalf.
The resulting ZIP requires the password you set to open in any ZIP-compatible software that supports AES encryption — most modern archive tools (7-Zip, WinRAR, macOS Archive Utility with the right settings) handle this correctly, though some very old or basic tools may only support the legacy method.
Everything happens locally: your files and the password you choose are never transmitted anywhere — encryption happens entirely inside your browser's WebAssembly sandbox.
How it works
- Add your files. Select the files to include in the protected archive.
- Set a password. Choose a password to encrypt the archive with.
- Download the protected ZIP. An AES-256 encrypted archive, ready to share securely.
Examples
Sharing sensitive files securely
Input
3 files + a chosen password
Output
protected.zip, requiring the password to open