How to use an Android phone as a webcam without internet

Yes, an Android phone can work as a webcam for a Mac without internet. A USB cable needs no network of any kind, so Android's built-in USB webcam mode works with Wi-Fi switched off. The wireless options need a local network, which is not the same thing as internet: a router with its internet line unplugged still connects the phone and the Mac to each other. What does need internet is installing or buying the apps in the first place, and of course the video call itself.

Publisher note: The Relay publishes this guide and is one of the products discussed. Details about other products come from each maker's own pages, checked on 1 October 2026. Prices and features change, so confirm before you buy.

What is the difference between no internet and no network?

People mean two different things by "without internet", and the answer depends on which.

• No internet, but a router. The broadband is down, or you are using a travel router or a router in a workshop that was never connected to a provider. The phone and the Mac both join its Wi-Fi. They can reach each other. They cannot reach the outside world. This is a local network.
• No network at all. No router, or a network you are not allowed to join. The phone and the Mac have no wireless path to each other unless one of them creates it. A cable is the dependable answer.

A webcam tool that sends the picture straight from the phone to the Mac only needs the first. A tool that routes through its maker's servers needs real internet. None of the options below describes a cloud relay for the video, but each maker says different amounts about it, so the table reports only what they state. For background, see what local network only means.

One thing no tool can change: a Zoom or Meet call needs internet. Without it, the phone camera is useful for recording on the Mac, in Photo Booth or QuickTime Player, or in OBS.

Which phone webcam options work with no internet?

The cable route, step by step

This is the one that works in a field, a basement, or a locked-down building.

1. Connect the phone to the Mac with a USB data cable. The Android documentation says webcam mode does not work with USB 3.0 or later cables on macOS, so use a USB 2.0 cable.
2. On the phone, tap the USB notification and select Webcam under "Use USB for". Google's steps are written for Pixel phones. Other makers have to enable the mode, so the option may be missing on your phone.
3. On the Mac, open the app you are recording in and choose the phone as the camera.

Google says the phone "charges normally over USB while in webcam mode", which matters when there is no mains socket for a second charger.

If your phone lacks the option, Camo's support page describes a USB connection to a Mac: open Camo on the phone, connect the cable, and select the device in Camo Studio. Install both parts while you still have internet.

Does The Relay work without internet?

Partly, and the distinction matters.

With The Relay, the phone's camera and microphone appear on the Mac as a camera and a microphone. The two devices talk over your own Wi-Fi network, with Bluetooth as a fallback, and the camera stream travels over that local network. A router with no internet line is still a local network.

What does need internet: getting the app. Buying it means creating an account with an email address and paying through Stripe, and you download it from the download page. So we will not tell you it works with no internet ever. Set it up at home, on a working connection, before you take it somewhere offline. If you plan to depend on it at an offline site, rehearse first: unplug your router's internet line at home and check that the camera still appears on the Mac. The privacy policy has the detail on what the account involves.

When The Relay is the wrong tool here:

• There is no router at all. It needs both devices on the same local network or in Bluetooth range, and it has no USB mode. Use the cable route.
• You only need a camera for an offline recording. The free USB mode does that.

It costs $19.99, paid once, and needs Android 8.0 or later and macOS 13 Ventura or later. We have not measured its picture quality or delay, or anyone else's.

How do I check that a webcam app is really local?

You do not have to take a maker's word, ours included. This takes five minutes.

1. Set the phone webcam up normally and confirm the picture shows in Photo Booth on the Mac.
2. Pull the internet cable out of the router, or switch off the modem, leaving the router's Wi-Fi on.
3. Confirm the Mac has no internet by loading any web page.
4. Check the picture in Photo Booth. If it is still moving, the video is travelling locally.
5. Quit and reopen both apps with the internet still off. Some apps run fine once started but want a connection at launch.
6. Plug the internet back in.

What about using the phone's hotspot as the network?

A phone hotspot creates a small Wi-Fi network that the Mac can join, and DroidCam's help page mentions "a WiFi hotspot" as a workaround on networks with firewalls. Whether a given webcam app works with the Mac joined to the phone's own hotspot is something each maker would have to confirm. We have not documented it for The Relay. If you have no router, the cable is the safer plan.

Questions people ask

Can I use my phone as a webcam with no Wi-Fi at all?

Yes, over USB. Android's USB webcam mode uses only the cable, if your phone offers it. Camo also describes a USB connection to a Mac.

Does a phone webcam use mobile data?

The USB mode involves no network. DroidCam says its video remains in your local network, and The Relay's camera stream travels over the local network. If you want to be sure of any app, switch mobile data off on the phone during the test above and see whether the picture continues.

Does the Mac need internet to recognise the phone over USB?

No driver download is described. The Android documentation says the phone presents itself as a standard USB Video Class camera, which is the kind of camera that works without software from its maker.