Why Zas?
Zas moves things — files, photos, text — between your devices and the people you choose, then gets out of the way.
What is it for?
Send something from one device, use it on another, done. No cables, no emailing yourself, no chat with yourself growing forever. Whatever you don't pin leaves on its own, so there is nothing to tidy up later.
Why not WhatsApp or Telegram?
Messengers are built for conversations: what you send yourself piles up in an endless chat, photos get compressed, and your files live on their servers. Zas sends the original within the limit shown by the app, without compression. It encrypts the file before upload and deletes it when its time runs out.
Why not Drive or Dropbox?
Those are warehouses: you store, sort folders, manage quotas and pay to keep everything forever. Zas is a corridor: things pass through, get used, and leave. There is nothing to organize and nothing piling up. Content is encrypted on your device before it travels.
What about privacy?
Everything is encrypted on your device before it leaves. The database and object storage receive encrypted bytes, not open filenames, content, or previews. A separate service derives account keys. Zas therefore does not call this design end-to-end encryption. For public links, the key is after # and a normal request does not send it to the server.
Can I share with other people?
Yes. Share one item with a public link that dies when the item does, or share a whole channel with someone. Content stays encrypted while it is stored and transported.
Why are some notes covered?
Because the sending device marked it as possibly holding a password. That check happens on the sending device before encryption. The mark stays only inside the encrypted item data. The server does not store it as a readable field. Tap the note to reveal it. It covers itself again when you switch channels or return to the tab. This only protects against someone reading over your shoulder. A note with no mark is shown normally. This does not mean it holds no password. You can turn covers off in Settings.
How do I send a file from my phone to my computer?
Open zas.red on the computer and start a session. Scan its QR code with the phone, or send yourself the session link: both devices are now in the same session. Choose the file on the phone and it shows up on the computer to download. It works both ways, with no cable, no account and nothing to install. For large files, Direct sends them from one browser to the other while both are open, without storing them in between: up to 5 GB without an account and 10 GB with a free one. Everything is encrypted on your device before it leaves.
Is this a WeTransfer or AirDrop alternative?
For that job, yes. You need no account, and the file is encrypted on your device before it leaves: the server stores only encrypted data. It deletes itself after 2 days, or 5 with an account, unless you pin it. AirDrop reaches other brands only on a few Android phones. Zas sends files between any phones, whatever the brand, and also to a PC or a browser tab, with nothing to install on the other side.
Do I need to install an app or create an account?
Not to start. Open zas.red and you can paste or drop something right away. Without an account, each item lasts 2 days and the session holds up to 30 MB. To keep things longer and get more room, sign in with Google, Apple or an email code. There are Android and iOS apps if you prefer them, but the browser is enough.
How do I send large files for free?
It depends on the size. Stored, a free file goes up to 50 MB and waits to be downloaded. For something big, Direct sends it from one browser to the other while both are open: up to 5 GB without an account and 10 GB with a free one, storing nothing in between. No card, no subscription. Everything is encrypted on your device before it leaves.
Can I send files between iPhone and Android?
Yes, in any pairing. Zas runs in the browser on both phones, and there are iOS and Android apps if you prefer them. AirDrop reaches other brands only on a few Android phones. Zas sends files between any phones, whatever the brand. No account is needed to start, and the file is encrypted on your device before it leaves.
Can I copy and paste text between my phone and my computer?
Yes. Open zas.red on both devices and put them in the same session with the QR code or the link. Paste a piece of text or a link on one and it shows up on the other to copy, with no cables and no emailing yourself. Whatever you do not pin goes away on its own, so no history piles up. Everything is encrypted on your device before it leaves.
Does it work like AirDrop on Windows or Android?
For that job, yes. AirDrop only connects Apple devices; it does not exist on Windows and reaches Android only on a few phones. Zas runs in the browser, so it connects an iPhone, an Android, a Windows or Linux PC and a Mac, in any pairing, with nothing to install on the other side. For large files, Direct sends them from one browser to the other while both are open, storing nothing in between. No account is needed to start, and the content is encrypted on your device before it leaves.
How is it different from LocalSend, Snapdrop or Send Anywhere?
LocalSend and Snapdrop only work when both devices sit on the same Wi-Fi network; off that network they cannot see each other. Send Anywhere lets you send anywhere, but it keeps your files on its servers. Zas does both: Direct sends from one browser to the other even across different networks, device to device, storing nothing in between; if they cannot connect, a relay passes the encrypted bytes without keeping a copy. And anything that is stored is encrypted on your device before it leaves and deletes itself after five days. It runs in the browser, with nothing to install and no account needed to start.
How do I move files from an iPhone to a Windows PC?
AirDrop does not exist on Windows, so it is no help here. With Zas you open zas.red in the browser on the iPhone and on the PC: nothing to install on either side, and no cable. For a large file, Direct sends it from one browser to the other while both are open, up to 10 GB, storing nothing in between; if the devices cannot reach each other, a relay passes the encrypted bytes without keeping a copy. Both devices do not need to be on the same Wi-Fi network, and no account is needed to start. Anything that is stored is encrypted on your device before it leaves and deletes itself after five days.
Is it safe? What happens to my files afterwards?
Anything stored is encrypted on your device before it leaves; the server only ever sees encrypted bytes. It is not end-to-end, and we do not pretend it is: for an account, a server-side service helps derive the keys. With Direct the file goes straight from one browser to the other, and if they cannot reach each other a relay passes the encrypted bytes without keeping a copy — nothing is stored unless a direct connection is impossible, in which case an optional 24-hour encrypted copy bridges the gap. Everything expires: five days by default, two without an account, and you can ask for less, down to one day. For the really sensitive stuff, you can make something delete itself the moment the other side opens it. Expired means gone: there is no trash and no way to get it back.
Does Zas train AI on my files?
No. What you send is encrypted on your device before it leaves, so the server only ever receives encrypted bytes: no filenames, no titles, no content, no previews in the clear. There is nothing readable to train on. Zas also does not sell your files or hand them to third parties for advertising, and everything deletes itself after five days (two without an account). It is the opposite of leaving your things in a warehouse that keeps and reads them: Zas is a corridor, not a warehouse.
