Why AES-256 instead of a simpler password?

AES-256 is a modern, cryptographically strong encryption standard, meaningfully stronger than the legacy ZipCrypto method many basic ZIP tools default to, which has known weaknesses.

Will every ZIP tool be able to open this?

Most modern archive tools (7-Zip, WinRAR, and macOS's Archive Utility with the right handling) support AES-encrypted ZIPs correctly, though some very old or basic unzip tools may not.

What happens if I forget the password?

There's no way to recover it — AES-256 encryption is specifically designed to make that infeasible. Keep the password somewhere safe.

Is my file or password uploaded anywhere?

No — encryption happens entirely inside your browser using a real 7-Zip build compiled to WebAssembly.

Can I add more files to an already-protected ZIP later?

Not with this tool — create a new protected ZIP including all the files you need each time.

Free Online ZIP Password Protector

Create an AES-256 Encrypted ZIP Archive

Need to use ZIP Password Protector right now?

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.

No sign-upNo uploads 100% free

Add files to protect

Processed locally in your browser — never uploaded

Password

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.

Other tools in Archive Tools

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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?

IT adminsDevelopersOffice workersStudents

People also search for

Add a Password to a ZIP File Encrypt a ZIP File Protect a ZIP With a Password ZIP File Encryptor Lock a ZIP Archive

About ZIP Password Protector

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