Relayium

AirDrop for Windows, Linux and Android

Last updated: 2026-07-09

AirDrop only exists inside Apple's world, which leaves everyone else — Windows, Linux, Android, and any household with a mix of devices — without a built-in equivalent. This guide shows the closest thing to AirDrop for non-Apple devices: open a web page on both ends and the file just moves.

It works the same way regardless of platform, so it also covers the case AirDrop never handles well: a Windows laptop, a Linux desktop and an Android phone all in the same room, or all three plus an iPhone thrown in.

The AirDrop-like flow: same Wi-Fi, in the browser

This is the everyday case AirDrop is built for, and Relayium matches it without needing an app from any store.

Across the internet: something AirDrop can't do

AirDrop is nearby-only — walk out of Bluetooth/Wi-Fi range and it stops working. Relayium's second mode covers exactly that gap: two devices on completely different networks, anywhere in the world.

The sender signs in and gets a short pairing code (with a join link and a QR code); the receiver enters it, or scans the QR, or opens the link — and never needs an account. The two devices then connect directly whenever the networks allow it; when a direct path isn't possible, the encrypted stream falls back to a TURN relay that only ever sees ciphertext, so it stays end-to-end encrypted the whole way. A dropped connection can resume instead of restarting from zero.

What's actually protecting the file

Both modes above are realtime transfers, and both use the same encryption: an X25519 key exchange derives a key used for per-chunk AES-256-GCM, negotiated only between the two devices. Both sides display the same 6-digit verification code (a Short Authentication String) so you can confirm no one is sitting in the middle, and each file is checked end-to-end with a SHA-256 hash.

Nothing is stored on a server in this mode — it exists only for the duration of the transfer. Relayium is open source under the MIT license at github.com/relayium/relayium, so the mechanics are auditable rather than a black box.

The practical limits, honestly

Because the file never lands on a server, there's no upload quota — the real limit is which browser is receiving. On Windows, Linux or Android with Chrome or Edge, incoming data streams straight to disk, so multi-gigabyte files are fine. On Firefox or an iOS Safari receiver in a mixed fleet, the file buffers in memory instead, so keep those transfers under roughly 200 MB.

Folders work too: pick a folder on desktop (not iOS) and relative paths are preserved. If the receiving browser can write straight to a chosen directory (Chrome, Edge) files land in place; otherwise (Firefox, Safari) the whole folder arrives as one .zip that unpacks to the same structure.

Frequently asked questions

Is there an official AirDrop app for Windows or Android?

No — AirDrop is exclusive to Apple devices and Apple has never shipped a Windows or Android client. Relayium is a browser-based equivalent: open relayium.com on both devices and it works the same way regardless of platform, including mixed Apple/non-Apple pairs.

Do I need an account?

Not for the same-Wi-Fi flow — open the page on both devices and they discover each other, no sign-in at all. Sending across different networks with a pairing code requires the sender to sign in; the person receiving never needs an account, on either network mode.

Do I need to install anything?

No. It's a web page on every platform — Windows, Linux, macOS, Android and iOS — so there's nothing to download from a store and nothing to keep updated.

How is this different from the Relayium vs AirDrop comparison?

That article is a head-to-head look at where AirDrop is genuinely better (pure-Apple households) and where it falls short. This guide is the how-to for actually getting the AirDrop-like experience when at least one device isn't an Apple one.

Can it send to a group, like AirDrop can?

On the same network, yes — the local room isn't limited to two devices, so more than one nearby device can receive at once. The pairing-code mode for across-the-internet sending is a direct connection between two devices.

Open Relayium on your Windows, Linux or Android device and the one you're sending to — no account needed on the same network.

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