Spantop
Turn any device into
a second display.
Use your tablet or another Mac as an extended display for your Mac. Connect via USB-C, WiFi, or Thunderbolt — with full touch and mouse input.
Features
More screen, wherever you are.
USB-C, WiFi, or Thunderbolt
Connect however you want. USB for the best quality, WiFi for wireless convenience, Thunderbolt for lossless Retina streaming.
Full Touch & Mouse Input
Tap, drag, scroll, and right-click on your tablet or second Mac. Your extended display is fully interactive.
Multi-Device Support
Connect multiple tablets and Macs simultaneously. Each becomes an independent display in macOS Display Settings.
Dual Codec Engine
Lossless LZ4 compression for wired Mac-to-Mac connections. Hardware-accelerated H.265 for WiFi and tablet.
Retina HiDPI
Full Retina resolution over wired connections. Crisp text and sharp UI on your extended display.
60 FPS Streaming
Smooth, real-time screen streaming with backpressure management and hardware acceleration.
How it works
Four steps to more screen.
- 1
Install on Mac
Download and install Spantop on your Mac.
- 2
Install on Device
Get the tablet app or install Spantop on your second Mac.
- 3
Connect
Plug in a USB-C cable or join the same WiFi network.
- 4
Extend
Scan for devices, connect, and start using your new display.
Requirements
What you'll need.
Mac (Sender)
- macOS 14 (Sonoma) or later
- Apple Silicon or Intel
- USB-C / Thunderbolt / WiFi
Tablet
- A compatible tablet running Spantop
- H.265 hardware decoder
- USB-C cable or WiFi
Pricing
Free. Genuinely.
Free
No subscriptions. No accounts. No catch.
Screen data is streamed directly between your own devices over a local connection — never through any external server.
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