Windows 10/11 + Android 8 or newer

Your tablet is now
your second screen.

Extendesk turns any Android tablet or phone into an extra monitor for your PC. Over a USB cable or Wi-Fi, with real touch, your PC's sound and a hardware-accelerated picture.

  • No accounts or sign-ups
  • Finds your PC by itself
  • Nothing to set up on your network
2ways to connect: USB cable or Wi-Fi
3hardware encoders supported: NVENC, AMF and Quick Sync
2video codecs: HEVC and H.264
0accounts needed. Your screen never goes through a server
Features

Everything you expect from a second monitor

And a few things you don't expect from an app. No odd settings: open it, connect and go.

A real monitor, not a copy

Extendesk creates a virtual display in Windows sized to your tablet. You drag windows onto it like any other monitor. And if you prefer, it can also duplicate the screen you already have.

USB cable or Wi-Fi

Over a cable you get the lowest latency and no packet loss. Over Wi-Fi the app finds your PC by itself, with no IP addresses to type and no router settings to touch.

Direct touch

Your fingers are real Windows touches: multi-touch with pressure, pinch to zoom, two-finger scrolling and press-and-hold for right click.

Your PC's sound on the tablet

Choose where your PC plays sound. On the tablet, the PC speakers are muted while it lasts and come back when you finish.

Hardware acceleration

The PC encodes with its graphics card (NVENC, AMF or Quick Sync) and the tablet decodes in hardware. Your processor stays free for your own work.

Automatic smoothness

It picks the frame rate, quality and codec (HEVC or H.264) by itself. If Wi-Fi is tight or the graphics card is busy, it adapts and tells you why.

Battery profiles

High, Balanced or Saver. With Saver the tablet lasts longer: fewer frames per second, capped brightness and a Wi-Fi radio that can rest.

How it works

From zero to two screens in three steps

No networking knowledge or settings needed. Extendesk picks the best way to connect by itself.

  1. 01

    Install Extendesk on your PC

    One installer for Windows 10 or 11. It sets up the program, the virtual monitor and everything needed for the USB cable.

  2. 02

    Install the app on your tablet

    The app works on tablets and phones running Android 8 or newer. The first time you open it, it shows a short guide.

  3. 03

    Connect and go

    On the same Wi-Fi, the tablet finds your PC by itself. Want it even smoother? Plug it in with a USB cable.

Under the hood

How each frame travels from your PC to the tablet

Virtual displayA driver creates an extra monitor in Windows.
Capture on the GPUEncoded with NVENC, AMF or Quick Sync.
Custom protocolVideo travels over UDP, on Wi-Fi or USB.
Hardware decodingAnd it is drawn on the next screen refresh.
Touch backYour fingers go back to the PC over the same channel.
Use cases

One more screen, a thousand ways to use it

That phone or tablet in your drawer can be the monitor you were missing.

Your code big, the docs beside it

Keep the editor on your main monitor and put the docs, the terminal or the app you're testing on the tablet. No more jumping between windows.

  • Terminal or logs always in view
  • Rotate the tablet to read in portrait
  • Scroll with two fingers
Cable or Wi-Fi

You choose how to connect

If the tablet is reachable both ways, Extendesk uses the cable. If you unplug it, it reconnects by itself.

Fastest

USB cable

The lowest latency and no lost packets. Works with USB tethering (no developer mode) or withUSB debugging for an even smoother picture.

  • Lowest possible latency
  • Bypasses your router and firewall
  • With USB debugging, the app opens by itself when you plug in
No cables

Wi-Fi

With the PC and the tablet on the same network, the app finds your PC by itself: no IPs, no ports. Great for moving around the house or taking the tablet to another desk.

  • Low latency on a good network
  • Lowers quality a little if the network is tight, then recovers
  • Best on 5 or 6 GHz
Download

Two downloads and you're set

One for your PC and one for your tablet or phone.

Extendesk for Windows

Installer with the program, the virtual monitor and everything needed for the USB cable.

System
Windows 10 or 11, 64-bit
File
Extendesk-Setup.exe
Windows: coming soon

Extendesk for Android

The app for your tablet or phone, from Google Play.

System
Android 8.0 or newer
Price
Free, with ads
Google Play: coming soon

Both apps are needed: the Windows program creates the screen and the Android app shows it.

Frequently asked questions

Questions? Here are answers

What people ask most before trying Extendesk.

What do I need to use Extendesk?

A Windows 10 or 11 64-bit PC and a tablet or phone running Android 8.0 or newer. You install Extendesk on both and connect them over Wi-Fi (same network) or a USB cable.

Does it work with phones or only tablets?

Both. The extra screen is created to fit your device, whether it's a big tablet or a phone.

Is it an extra screen or a copy of mine?

Both. By default, Extendesk creates a new virtual monitor in Windows and you can drag windows onto it. If you'd rather see the same as on your screen, choose “Duplicate” on the PC.

Which is better, USB cable or Wi-Fi?

The cable gives the lowest latency and loses no data. Wi-Fi needs no setup but works best on 5 or 6 GHz. If the tablet is reachable both ways, Extendesk uses the cable.

Do I need to turn on developer mode?

No. Over Wi-Fi you need nothing, and over a cable you can use Android's USB tethering. USB debugging (in developer options) is optional: it gives a little more smoothness and lets the app open by itself when you plug in the tablet.

Can I touch the tablet to control the PC?

Yes. With “Touch” your fingers are real Windows touches: multi-touch with pressure, pinch to zoom, two-finger scrolling and press-and-hold for right click. If you only want to look, choose “View only”.

Can I hear my PC's sound on the tablet?

If you want. On the PC you choose where sound plays: on the PC or on the tablet. While it plays on the tablet, the PC speakers are muted and come back when you finish.

Does it drain the battery?

It depends on the profile. “High” gives the smoothest picture; “Balanced” limits to 60 fps; “Saver” drops to 30 fps, caps brightness and lets the Wi-Fi radio rest. You can also let it lower quality by itself if the tablet's battery can't keep up.

Do I need a specific graphics card?

No. Extendesk uses your graphics card's hardware encoder: NVENC on NVIDIA, AMF on AMD or Quick Sync on Intel. If the card is very busy, it lowers the frame rate by itself and tells you.

Does my screen go over the internet?

No. The picture goes straight from your PC to your tablet over your local network or the USB cable, without passing through any server. For now, use it on networks you trust, such as home or work.

Can I make things bigger on the tablet?

Yes: raise “Scale” in Windows display settings instead of lowering the resolution. Everything looks bigger and stays sharp.

Contact

Let's talk

An idea, a bug, or your tablet won't connect? Write to us and we'll reply. It helps if you tell us your tablet model and your graphics card.

Your email app will open with the message ready to send.

That device in your drawer
wants to work again.