ZST Is Fast. But What About Encryption?

Agreed. Cut after the main product point and end sharper:

ZST Is Fast. ZSTsecure Makes It Private.

Zstandard, or ZST, is a modern compression format: fast, efficient, and usually smaller than ZIP.

That makes it great for backups, project folders, exports, logs, datasets, and other files that are compressed and unpacked often.

But ZST has one missing piece:

It was built for compression, not for password-protected archives.

With ZIP or RAR, encrypted archives are familiar. You choose files, set a password, and create an archive that is compressed and protected.

With ZST, that simple workflow was missing — especially on macOS.

That is the gap ZSTsecure fills.

ZSTsecure is a native Mac app built specifically around encrypted ZST archives. It lets you encrypt .zst and .tar.zst files with a password, decrypt .zst.enc files, and compress files directly into encrypted ZST archives.

Everything happens locally on your Mac. No command line, no separate encryption step, no cloud upload.

ZST made compression fast.
ZSTsecure adds the missing native encryption workflow.