age
Lock any file with a passphrase or a key so only you, or the people you choose, can open it. One small command-line tool, no account.
What you can do with it
- Lock ID scans before uploading them to cloud storage
- Send a document only one person can open
- Encrypt a whole folder before backing it up
Worth knowingCommand line only, and there's no recovery: lose key.txt or forget the passphrase and the files are gone for good. In Windows PowerShell always use -o, because > and | corrupt the output.
The full tutorial
01Get ageFREE02Lock a file with a passphraseMEMBERS03Make your own key pairMEMBERS04Lock files for yourself, or for someone elseMEMBERS05Send it as text you can paste into any messageMEMBERS06Lock a whole folder, and know what failure looks likeMEMBERS
Lock any file with one command, so only you (or the person you choose) can open it · ~25 min · tested 2026-10-09
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