How to Cast to Roku TV
Want to cast web videos to your Roku TV? Whether you're looking for web video cast for Roku, trying to cast web video to Roku from a phone, or wondering if you can cast from a Chromebook to a Roku TV, this guide covers every method. CastBrowser makes it easy to stream compatible web videos to Roku TV, Roku Stick, Roku Ultra, Roku Express, and other Roku streaming devices — Chrome's built-in cast button cannot reach Roku at all, so a dedicated app is required.
Cast to Roku in 30 seconds
- Install CastBrowser (free) on your Android or iPhone.
- Connect both your phone and Roku to the same Wi-Fi network.
- Open a compatible website in CastBrowser — it auto-detects playable non-DRM videos on the page.
- Tap the cast icon and pick your Roku from the device list.
- The Roku plays the video through its native player. Chrome's cast button cannot reach Roku — only a Roku-native app can.
Heads up: Roku doesn't support Chromecast (Google Cast). If you see a “cast source not supported” error, it usually means the app used an unsupported protocol or sent Roku a format it cannot decode.
What You Need to Cast to Roku
Casting to Roku sends the video stream directly to your TV over your local network. Your phone acts as a remote control, which means lower battery drain and better video quality compared to screen mirroring. Here's what you need:
- A Roku device (Roku TV, Roku Streaming Stick, Roku Ultra, Roku Express, or Roku Premiere)
- An Android or iOS phone with CastBrowser installed
- Both devices connected to the same Wi-Fi network
- No account or subscription required — CastBrowser is completely free
How to Cast to Roku TV (Step-by-Step)
Install CastBrowser on Your Phone
Download CastBrowser from the Google Play Store for Android or the Apple App Store for iPhone. The app is free with no account required. It includes a full web browser with multi-tab support, automatic video detection, and a built-in ad blocker.
Connect Your Phone and Roku to the Same Wi-Fi
Both your phone and Roku must be on the same Wi-Fi network. CastBrowser automatically finds Roku devices on your local network. If your router has separate 2.4GHz and 5GHz bands, either band works as long as both devices can reach each other.
Browse to a Website with Videos
Open CastBrowser and navigate to a compatible website with video content. You can type a URL directly or use the search bar. CastBrowser's built-in browser works just like Chrome or Safari — it supports tabs, bookmarks, and history.
Let CastBrowser Detect the Video
CastBrowser automatically detects videos on every page you visit. When videos are found, you'll see a notification. Tap to view available videos with quality options when multiple resolutions are available.
Cast to Your Roku
Tap the cast icon and select your Roku device from the list. CastBrowser communicates with your Roku using its native protocol, which means reliable playback without screen mirroring. The video starts playing on your TV. Use your phone to play, pause, seek, and adjust volume.
Pro tip: Background casting
Once the video is playing on your Roku, you can turn off your phone screen or switch to other apps. CastBrowser supports background casting, so the stream continues uninterrupted. You can also save your playback position and resume later with CastBrowser's playback resumption feature.
How to Cast from Chromebook to Roku TV
This is one of the most common questions people have: can you cast from a Chromebook to a Roku TV? The short answer is that Chromebooks and Roku speak different casting languages, which makes direct casting tricky. Here's what you need to know.
Why Chromebook-to-Roku Casting Is Complicated
Chromebooks use Google Cast (the same protocol as Chromecast) for wireless streaming. Roku uses its own separate casting system that is not compatible with Google Cast. This means the built-in "Cast" button in Chrome on a Chromebook will not detect your Roku device.
Some Roku devices do support Miracast for screen mirroring from Windows laptops, but Chromebooks do not support Miracast either. So the main wireless display options that Roku offers are both unavailable from a Chromebook.
The Best Workaround: Use CastBrowser on Your Phone
The most reliable way to get compatible web video onto your Roku is to use CastBrowser on your Android or iPhone. Open the same website you were viewing on your Chromebook in CastBrowser, and cast the detected video directly to your Roku TV. CastBrowser supports Roku natively, so the video plays through Roku's own playback path.
Chromebook to Roku: Your Options
- Chrome Cast button: Will not work — Roku does not support Google Cast protocol
- Miracast screen mirroring: Not available — Chromebooks do not support Miracast
- HDMI cable: Works if your Chromebook has an HDMI port, but requires a physical cable
- CastBrowser on phone (recommended): Browse the same site on CastBrowser and cast to Roku wirelessly
Chromecast vs Roku — Can You Use Chromecast with Roku?
If you've searched for "chromecast to roku" or "google cast to roku," you're not alone. Many people assume that because Chromecast is so popular, every streaming device supports it. Unfortunately, that's not the case with Roku.
Chromecast (Google Cast) is Google's casting protocol. It's built into Chrome browser, Android phones, and Chromecast hardware. When you tap "Cast" in an app or browser, it looks for Google Cast-compatible devices.
Roku uses its own separate casting system. Roku devices do not show up when you use Chrome's cast button or any app's built-in Chromecast feature.
Google Cast (Chromecast)
- Works with Chromecast dongles
- Built into Google TV and Android TV
- Supported by Chrome browser
- Used by YouTube, Netflix apps, etc.
- Does NOT work with Roku
Roku Casting
- Works with all Roku devices
- Proprietary to Roku
- Not supported by Chrome browser
- Requires Roku-compatible apps
- Supported by CastBrowser
This is exactly why CastBrowser exists. Instead of relying on Google Cast (which Roku ignores), CastBrowser supports Roku natively. It discovers your Roku on the network, and streams the video directly — no Chromecast hardware needed.
How to Cast Chrome Browser to Roku
If you're trying to cast a video from Chrome browser on your computer to a Roku TV, Chrome's built-in cast feature won't help — it only works with Chromecast devices. But there are a few workarounds depending on your setup.
Option 1: Use CastBrowser on Your Phone (Recommended)
The easiest and most reliable method is to use CastBrowser on your phone instead of Chrome on your computer. Open the same website in CastBrowser, and the app will detect the video and cast it directly to your Roku. This gives you the best video quality, built-in ad blocking, and full playback control from your phone.
Option 2: Miracast Screen Mirroring (Windows Only)
If you're on a Windows PC, some Roku devices support Miracast screen mirroring. Go to your Roku's Settings > System > Screen mirroring and enable it. Then on your Windows PC, press Win+K to open the Connect panel and select your Roku. This mirrors your entire screen, not just the video, so it uses more bandwidth and shows everything on your desktop.
Option 3: Use the Roku Mobile App
The official Roku app offers basic media casting for photos and videos stored on your phone, but it does not include a web browser or automatic video detection. For web-based video content, CastBrowser is the better choice since it can browse compatible websites and detect playable videos automatically.
How to Cast to Roku TV from Android
Android is the most straightforward platform for casting to Roku. CastBrowser uses Roku's native protocol — not screen mirroring — so you get full video quality with minimal battery drain. Here's how to do it:
- Download CastBrowser from the Google Play Store
- Make sure your Android phone and Roku are on the same Wi-Fi network
- Open CastBrowser and browse to the website with the video you want to watch
- Tap the cast button in the toolbar — CastBrowser will find your Roku automatically
- Select your Roku device and the video starts playing on your TV
Android users also get background casting — once the video is playing on your Roku, you can lock your screen or switch to other apps and the stream keeps going uninterrupted. Playback controls stay available in your notification panel.
For more details, see our full guide to casting from Android to TV.
How to Cast to Roku TV from iPhone
iPhone users can cast to Roku TV just as easily. CastBrowser is available on the Apple App Store and follows the same simple process:
- Install CastBrowser from the App Store
- Connect your iPhone and Roku to the same Wi-Fi network
- Open CastBrowser and navigate to a compatible website with video content
- Tap the detected video, then select your Roku from the device list
- The video plays on your Roku TV — use your iPhone as the remote
Unlike AirPlay, which only works with Apple TV and AirPlay 2-compatible TVs, CastBrowser works with Roku, Chromecast, Fire TV, and DLNA Smart TVs — all from a single app. This makes it the go-to solution for iPhone users who own a Roku TV instead of an Apple TV.
For more details, see our full guide to casting from iPhone to TV.
How to Screen Mirror (Screencast) to Roku — and Why Casting Is Better
If you've searched for how to screencast to a Roku device, it's worth understanding the difference between screen mirroring and video casting — because they work very differently. Roku does support screen mirroring via Miracast (from Android phones and Windows PCs), but casting with CastBrowser gives a fundamentally better experience for watching videos. Here's why:
CastBrowser (Video Casting)
- + Sends the video stream directly to Roku
- + Full video quality — no re-encoding
- + Low battery usage on your phone
- + Use your phone freely while casting
- + Built-in ad blocker
- + Subtitle support (SRT/VTT)
- + Works on both iPhone and Android
- + Supports 20+ video formats
Roku Screen Mirroring
- - Mirrors your entire phone screen to TV
- - Compressed quality with noticeable lag
- - Drains your battery quickly
- - Phone is locked to the mirrored content
- - No ad blocking
- - Notifications and private info visible on TV
- - Not available on iPhone (no Miracast)
- - Limited to what your phone can display
Screen mirroring has its place — it's useful for presentations, showing photos, or demonstrating an app. But for watching videos, casting with CastBrowser delivers better quality, saves battery, and lets you use your phone normally while the video plays on your TV.
Supported Roku Devices
CastBrowser works with current Roku streaming players and Roku TVs, including:
- Roku Smart TVs (TCL, Hisense, Sharp, Philips, and others)
- Roku Streaming Stick and Streaming Stick 4K
- Roku Express and Express 4K+
- Roku Ultra and Ultra LT
- Roku Premiere and Premiere+
- Roku Streambar and Streambar Pro
CastBrowser also works with Amazon Fire TV, Samsung Smart TVs, Chromecast, and any DLNA-compatible TV. If you have multiple devices at home, one app covers all of them.
Supported Video Formats for Roku Casting
CastBrowser detects and casts videos in over 20 formats, including both on-demand and live streams. If a video format is not natively supported by your Roku device, CastBrowser handles the conversion automatically.
This broad format support means you can cast videos from many compatible websites, including sites that use HLS, DASH, and standard MP4 streams.
Why Use CastBrowser to Cast to Roku?
- Native Roku support: CastBrowser connects directly to your Roku for reliable casting — no screen mirroring needed.
- Automatic video detection: Finds playable videos on compatible websites automatically — no need to search for URLs.
- Built-in ad blocker: Enjoy a cleaner browsing experience — blocks ads, popups, bad redirections, and trackers.
- Cast local files: Beyond web videos, cast media files stored on your phone directly to your Roku.
- Subtitle support: Load SRT or VTT subtitle files for any video you cast.
- Playback resumption: Stop a video and pick up where you left off later.
- Completely free: No subscription, no hidden fees, no account required.
Troubleshooting Roku Casting Issues
Roku not showing up in the device list?
- Check Wi-Fi: Verify both your phone and Roku are on the same Wi-Fi network. This is the most common cause.
- Enable external control: On your Roku, go to Settings > System > Advanced system settings > External control and make sure it is set to "Default" or "Permissive."
- Restart devices: Power cycle both your phone and Roku. For Roku, unplug it for 10 seconds and plug it back in.
- Disable VPN: VPNs on your phone can prevent local network discovery. Disable any active VPN and try again.
- Pull to refresh: In CastBrowser, pull down on the device list to refresh.
- Install the official Roku channel manually: Roku devices do not include a web browser. If discovery still fails, sign in to your Roku account from any browser and add the official CastBrowser Roku channel. After you add it to your Roku account, it installs automatically on Roku devices linked to that account.
- Check router settings: Some routers have "AP isolation" or "client isolation" enabled, which blocks devices from communicating with each other. Disable this in your router settings.
Video not detected on a website?
- Play the video first: Some websites only load the video stream after you press play. Start the video on the page, wait a few seconds, then check CastBrowser's detected videos list.
- Try a different page: Some sites use DRM protection that prevents video detection. Try a different source for the same content.
- Disable ad blocker temporarily: In rare cases, aggressive ad blocking can interfere with video loading. Try toggling the ad blocker off for that site.
Video buffering or playback issues?
- Lower video quality: If multiple quality options are available, try a lower resolution to reduce buffering.
- Use 5GHz Wi-Fi: If your router supports dual-band, connect both devices to the 5GHz band for faster throughput.
- Move closer to router: Weak Wi-Fi signals cause buffering. Move your Roku or router to improve signal strength.
- Close other apps: Other apps or devices using heavy bandwidth can cause buffering. Close unnecessary apps and pause downloads.
Frequently Asked Questions
How do I cast to Roku TV from Android?
Install CastBrowser from the Google Play Store, make sure your Android phone and Roku are on the same Wi-Fi network, then open CastBrowser and browse to the website with the video you want to watch. Tap the cast button — CastBrowser detects your Roku automatically and starts playing the video on your TV. Background casting is supported, so you can lock your screen or switch apps and the stream keeps going.
Can I cast to Roku TV from iPhone?
Yes. Install CastBrowser from the Apple App Store, connect your iPhone and Roku to the same Wi-Fi, open CastBrowser, browse to a website with video content, and tap the cast button to select your Roku. Unlike AirPlay, CastBrowser works with Roku, Chromecast, Fire TV, and DLNA Smart TVs — all from one app, with no Apple TV required.
Can you cast from a Chromebook to a Roku TV?
Not directly. Chromebooks use Google Cast (the Chromecast protocol) for built-in casting, but Roku uses a completely different streaming protocol that is incompatible with Google Cast. The Chrome browser's built-in cast button will never show Roku devices in its list. The most reliable workaround is to use CastBrowser on your Android or iPhone. Install CastBrowser, browse to the same website you want to watch, and the app detects the videos on the page and casts them to your Roku TV using Roku's native protocol. CastBrowser supports both Chromecast and Roku simultaneously from the same app, so you can cast to either device. The video quality is full native resolution — not screen mirrored.
Can you use Chromecast with Roku?
No. Chromecast and Roku are separate ecosystems that use incompatible casting protocols. Google Cast requires either a Chromecast dongle or a TV with Chromecast built-in, and Roku does not support it. Roku's streaming protocol is not compatible with Chromecast hardware either — you cannot pair them or use Google Home to cast to Roku. CastBrowser solves this by supporting both protocols independently: it can cast to Chromecast devices and Roku devices from the same app, using each device's native protocol. Install CastBrowser on your Android or iPhone, browse a compatible website with video, and you can cast to whichever device you have — Roku, Chromecast, Fire TV, or DLNA Smart TV.
How do I cast from Chrome browser to Roku?
Chrome's built-in cast feature uses the Google Cast protocol, which only works with Chromecast devices — it cannot discover or cast to Roku. To cast web videos from Chrome browser content to a Roku TV, install CastBrowser on your Android or iPhone. Navigate to the same website in CastBrowser, and the app automatically detects the videos on the page and casts them to your Roku using Roku's native protocol. On Windows PCs, some Roku devices support Miracast screen mirroring as an alternative, but this mirrors your entire screen at lower quality. CastBrowser's direct video stream approach gives better results and is free on both Android and iPhone.
What video formats does Roku support for casting?
CastBrowser supports casting 20+ video formats to Roku. On-demand formats include MP4, MKV, AVI, WebM, MOV, FLV, 3GP, M4V, OGV, WMV, and MPEG-TS. For adaptive streaming from modern websites, CastBrowser supports HLS (M3U8 playlists) and DASH (MPD manifests) — the protocols used by most streaming platforms. Live streams in HLS and DASH are also supported, so you can cast live TV or sports events to your Roku in real time. When a video format is not natively playable on the Roku, CastBrowser handles the conversion automatically before sending it to the device. All 20+ formats are available at no extra cost — no format packs or premium unlocks required.
What does “Cast source not supported” mean on Roku?
It usually means an app sent the Roku a video format it cannot decode, or used a non-Roku protocol like Google Cast. Roku doesn't support Google Cast, so Chromecast-only apps can surface this kind of error. The fix is to use an app that speaks Roku's native protocol — CastBrowser detects compatible video on the page, handles HLS compatibility when needed, and sends a Roku-compatible stream. See the full “Cast source not supported” Roku guide.
Does Roku support Chromecast?
No. Chromecast (Google Cast) is Google's proprietary protocol; Roku uses its own protocols, mainly ECP and DIAL. The Chrome cast button and Chromecast-only casting apps cannot see Roku. YouTube can control Roku through DIAL when the Roku YouTube channel is installed and signed in. For the full compatibility explanation, read Does Roku support Chromecast?.
Why is my Roku not showing up for casting?
The most common reason your Roku is not showing up is that your phone and Roku are on different Wi-Fi networks. Many routers broadcast separate 2.4 GHz and 5 GHz networks — ensure both devices are on the same one. If that looks correct, check that External Control is enabled: go to Settings → System → Advanced system settings → External control on your Roku and set it to Default or Permissive. Restart both your phone and your Roku (unplug it for 10 seconds). Disable any VPN or firewall app on your phone, as these block local network discovery. Pull down to refresh the device list in CastBrowser after making changes. Roku devices do not include a web browser, so if discovery still fails, log in to your Roku account from any phone or computer browser and add the official CastBrowser Roku channel. After you add it to the account, Roku automatically installs it on Roku devices linked to that same account.
Is CastBrowser free for Roku casting?
Yes, CastBrowser is completely free. There are no subscriptions, no hidden fees, and no account required. Download it from the Google Play Store or Apple App Store and start casting to your Roku right away.
Can I cast local files from my phone to Roku?
Yes. In addition to web videos, CastBrowser can cast video and audio files stored on your phone directly to your Roku TV. Open the local media section in the app, select a file, and cast it to your Roku just like a web video.
Does casting to Roku work with live streams?
Yes. CastBrowser supports HLS (M3U8) and DASH (MPD) live streams in addition to standard video files. If a website is streaming live content, CastBrowser will detect it and let you cast it to your Roku TV in real time.
Start Casting to Your Roku TV
Download CastBrowser for free and stream web videos to your Roku TV, Roku Stick, or Roku Express in seconds.