the player

Two channels, one file

Everything happens in this page. The file never leaves your machine, the key is never sent anywhere, and nothing is stored when you close it.

open

sealed

step one Drop a Zariia file here, or click to choose one. A plain .flac works too — it will simply have no sealed channel.

what you are looking at

Two vessels standing in the dark.

The left one is the open song. Load any file and it fills with gold — that channel plays for anybody, with no key and no permission.

The right one is the sealed channel. If the file carries one, the vessel appears cold and outlined: present, visible, and empty. That is the honest picture of the thing. You can see that something is there. You cannot hear it.

With the right key it fills from the bottom upward in vermilion, and both channels sound together. A wrong key does not partially open it or degrade gracefully. It is refused.

If a sealed channel uses the neural codec, the decoder is fetched once from a public CDN and then cached, so it works offline afterwards. That fetch is the one moment this page reaches outside itself.

How the format works ▸