Security
Password Protect ZIP File
Add a password to a ZIP file using ZipCrypto, the standard ZIP encryption method. Note: ZipCrypto is considered weak by modern standards and should not be used for sensitive data. For secure file encryption, use dedicated tools. If you simply need a ZIP that prompts for a password to open, this tool is functional for that purpose.
Input formats
Output formats
Common uses
- Add a simple access password to a ZIP before sending
- Discourage casual access to a shared archive
- Create a password-protected ZIP for a portal that requires it
Limitations
- ZipCrypto (standard ZIP password) is considered cryptographically weak. Do not use it for genuinely sensitive data.
- AES-256 encrypted ZIP is not supported in the browser with current libraries.
- Passwords are never stored or logged — if you forget your password, the contents cannot be recovered.
- This tool is for casual access control only, not for secure encryption.
Frequently asked questions
No. ZipCrypto uses a legacy encryption algorithm that can be broken. Do not use it to protect genuinely sensitive personal, financial, medical, or confidential data. Use dedicated encryption software for that.
Passwords are not stored anywhere. There is no way to recover the contents. Make sure you remember or safely store the password you set.
Yes. ZipCrypto-protected ZIPs can be opened on Windows, macOS, iOS, Android, and Linux with any standard archive tool that supports encrypted ZIPs.