Transparent background
Only the wheel, its title and the winner card show; your scene stays visible around it.
ChalkSpin Pro · for streamers
Spinner Wheel Stream Overlay
Add a transparent spinner wheel to your live stream as a browser source in OBS or Streamlabs, with your logo and colours, and spin it from your phone while you're live.
Live in five minutes
How to add the wheel to your stream
- Save the wheel you want on streamMake it on the wheel page (giveaway entries, challenges, viewer names) and press Save, or start from the giveaway wheel.
- Pick it here and brand itChoose the wheel, colours, accent and your logo. The live preview shows exactly what viewers will see.
- Add a browser sourceIn OBS or Streamlabs add a Browser source with your overlay URL, about 800 × 800, and place it on your scene.
- Spin livePress Spin on stream here, or interact with the source and click the wheel. The winner pops up on stream.
Made for giveaways and challenges
What the overlay does
Your branding
Your logo in the hub, the wheel colours you pick and an accent colour for the title and winner card.
Remote spin
Spin from this page on your phone or second monitor; the winner is reported back here.
A private link
The overlay URL is secret. If it leaks, make a new link and the old one stops at once.
Part of ChalkSpin Pro
Pro is $3.99 a month or $29 a year. It includes the stream overlay, your logo on wheels and bingo PDFs, unlimited saved wheels and class lists, bigger bingo batches and no ads, for you and for the people who open your shared wheels.
Fair for your viewers
Spins are picked with the browser's cryptographic random generator before the wheel moves, and slices are drawn to scale, so chat can see it's fair. Weights are always visible because they change the slice size.
Questions teachers ask
Stream overlay FAQs
Still stuck? Write to support@chalkspin.com.
How do I add the spinner wheel to OBS?
Copy your overlay URL, then in OBS choose Sources → + → Browser, paste the URL and set the size to about 800 × 800. The background is transparent, so only the wheel shows over your scene. Streamlabs works the same way with a Browser Source.
How do I spin it while I'm live?
Press Spin on stream in this panel (on your phone or a second screen), or right-click the browser source in OBS, choose Interact and click the wheel or press Space. The winner appears on stream and here.
Can I put my logo and colours on it?
Yes. Add your logo for the middle of the wheel, pick the wheel colours and an accent colour for the title and winner card. Your logo also shows on the wheels you share and on your bingo PDFs.
Is the overlay random and fair for giveaways?
Yes. Each spin uses the browser's cryptographic random generator with rejection sampling, and slices are drawn to scale, so every entry's chance matches its slice. Keep the spin history for proof.
What happens if my Pro plan ends?
The overlay URL stops showing the wheel (it turns into an empty, transparent source) and your settings are kept. Renew Pro and it works again with the same link.
Same fair randomness