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The editor shows Hardware acceleration isn’t available when your browser won’t give it access to your computer’s graphics. In most cases graphics acceleration is turned off in the browser: turn it on, relaunch the browser, then click Try again. Your video and edits are safe. The editor draws your video preview with your computer’s graphics processor (GPU) through a browser feature called WebGPU. When the browser can’t hand out a GPU, the preview can’t start.

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Turn on graphics acceleration in your browser

Open your browser’s settings page, turn the setting on, then fully quit and reopen the browser. Closing the tab is not enough. If you can’t find the setting, search your browser settings for “hardware acceleration” or “graphics acceleration”. After relaunching, open your video in the editor again and click Try again.

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Check whether your browser can use your graphics

If acceleration is already on, check what the browser itself reports. In Chrome, Edge, Brave or Opera:
  1. Open chrome://gpu (edge://gpu in Edge, brave://gpu in Brave).
  2. Under Graphics Feature Status, find WebGPU.
  3. Disabled or Unavailable means the browser has turned graphics off for your computer — continue with the steps below. Hardware accelerated means the browser can use your graphics; relaunch the browser and click Try again, and if the error comes back, see WebGPU is hardware accelerated but the error is still there.

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Update your browser and graphics drivers

Browsers turn graphics off on computers whose graphics drivers are too old or known to crash. Updating usually turns them back on.
  1. Update your browser to the latest version and relaunch it.
  2. Update your graphics drivers:
    • Windows: install the latest driver from your graphics maker (Intel, AMD or NVIDIA) or your laptop maker, or run Windows Update and install any optional driver updates.
    • Mac: install the latest macOS update from System Settings → General → Software Update.
  3. Restart your computer, then open the editor and click Try again.
If your computer has two graphics processors (common on Windows laptops), plug the laptop into power. Some laptops switch off the stronger GPU on battery.

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WebGPU is hardware accelerated but the error is still there

Your browser can block WebGPU for specific graphics chips or drivers it considers unreliable, even when chrome://gpu shows WebGPU: Hardware accelerated. If you’ve already updated your browser and graphics drivers, you can override that block with a browser flag:
  1. Open chrome://flags/#enable-unsafe-webgpu (edge://flags/#enable-unsafe-webgpu in Edge, brave://flags/#enable-unsafe-webgpu in Brave).
  2. Set Unsafe WebGPU Support to Enabled.
  3. Click Relaunch, then open your video in the editor and click Try again.
Chrome describes this flag as a developer setting that “could expose security issues to websites”. Only turn it on if the steps above didn’t work, and set it back to Default if it doesn’t fix the editor.
This flag can also help if the editor shows Your browser is rendering this editor without a GPU even though hardware acceleration is on.

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The editor in a virtual machine or remote desktop

The editor isn’t supported in virtual machines (such as Parallels, VMware or VirtualBox), remote desktop sessions (such as Windows Remote Desktop or Citrix), or cloud PCs. These usually don’t give the browser a real GPU. Open Tella in a browser directly on your own computer instead.

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Hardware acceleration on Linux

Chrome and Brave on Linux only turn on the graphics feature the editor needs for recent Intel and NVIDIA GPUs. On other GPUs, including AMD and older Intel, it stays off even with hardware acceleration on, but you can turn it on yourself:
  1. Make sure hardware acceleration is on (see the table above) and relaunch your browser.
  2. Open chrome://flags/#force-enable-webgpu-interop (brave://flags/#force-enable-webgpu-interop in Brave), set it to Enabled, and relaunch.
  3. If the editor still doesn’t load, also set chrome://flags/#enable-vulkan to Enabled and relaunch.
Firefox on Linux doesn’t support the editor yet. Use Chrome instead.

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Still seeing the error?

Click Contact support on the error screen and tell us which browser and computer you’re using and what chrome://gpu shows for WebGPU. You can still watch and share your video from its share page while we look into it.
Last modified on October 8, 2026