Your old phone is a hard drive now.

Pair two devices in the browser with a QR code, then move files straight between them. No account, no cloud upload, nothing to install.

Free to start. Pro is $14.99, paid once.

Skip the cloud. Use what you already own.

That drawer phone has 64 GB you're not using. SpareDisk lets two of your devices talk to each other directly.

Files stay on your devices

Transfers go device to device. We never store your files, and there's no upload limit set by a server.

No account

No sign-up, no email, no password. Open the page on both devices and pair.

Works in the browser

iPhone, Android, Mac, Windows, Linux. If it has a modern browser, it can pair.

Pair in under a minute

  1. Open SpareDisk on both devices

    Choose "Show QR" on the first device. It displays a pairing code.

  2. Scan, then type the reply code

    Scan the QR with the second device. It shows a short code. Type that code back into the first device.

  3. Send files

    Drag, tap, or paste. Files move directly between the two devices.

Pay once, not every year

Your first transfer is free. Pro adds the tools for people who move a lot of files.

Free

$0
  • One pair of devices at a time
  • Direct device-to-device transfers
  • No account or cloud storage
  • Progress, cancel, and integrity checks
Start free
Most popular

SpareDisk Pro

$14.99 one-time
  • Transfer queue and management
  • Transfer history and file categories
  • Duplicate detection and storage insights
  • Retry and resume where your browser supports it
  • Future Pro improvements
Get Pro

Launch offer: $9.99 for early customers.

Guides

Questions

Are my files uploaded anywhere?

No. Files travel directly between your two devices over an encrypted WebRTC connection. SpareDisk doesn't receive or store them.

Do both devices need to be on the same Wi-Fi?

Not required. Pairing uses a QR code and a typed code, so no server has to introduce the devices. Some strict networks block direct connections, and in that case a transfer may not connect.

Do I need to install an app?

No. SpareDisk runs in the browser. You can add it to your home screen as an app if you want.

What happens if I close the page mid-transfer?

The transfer stops, since the page is the connection. Pro can retry and resume where your browser allows it.

Is Pro a subscription?

No. It's a single payment of $14.99. There is no yearly fee.

Is the connection encrypted?

Yes. WebRTC data channels are encrypted in transit using DTLS.

Find that old phone. Put it to work.

Open SpareDisk on two devices and send your first file.