How to Create an Encrypted ZIP File

Encrypted ZIP files are useful for sharing sensitive documents, but only if you choose a reliable method and send the password separately.

Updated for 2026. This guide favors built-in tools and reputable free utilities before paid or obscure software.

Choose encryption deliberately

Password-protecting a ZIP is not the same as creating strong encryption. Some old ZIP methods are weak. For sensitive files, use a tool that supports AES encryption and make sure the recipient can open it.

Do not put the password in the same email as the archive. Use a different channel, such as a phone call, password manager share, or separate secure message.

Practical workflow

Collect the files in one folder, remove anything unnecessary, create the encrypted archive, test it locally, then send the archive and password separately. Testing matters because failed passwords waste time and can create support headaches.

Use a descriptive but not overly revealing filename. For example, client-documents.zip is better than tax-return-social-security-scans.zip.

Limitations

Encryption does not make a malicious file safe, does not prove identity, and does not fix poor password practices. Use it as one layer of a safer sharing workflow, not as magic protection.