< Troubleshooting Sandboxels

This page will walk you through fixing the most common issues that users have playing Sandboxels.


Ensure that you are playing on the official website, sandboxels.R74n.com. We cannot ensure it will work elsewhere.

Most issues are with mods, which are created by the community and not fixed by the Sandboxels developer.

Even if you don't remember enabling a mod, clear them with the following steps:

  1. Open Sandboxels.
  2. Find and press the Settings button at the end of the toolbar.
  3. Scroll to the bottom of the Settings, and press the Clear Mods button.
  4. Hit "OK" and make sure your webpage refreshes.

If you've done all of this and it hasn't fixed it, please find your issue below.

Loading screen takes forever

The loading screen should not last more than a few seconds. This means that something has crashed the webpage before it could finish loading.

This is usually because of a mod, so follow the steps above.

If you've done those steps, it may be that you are using an unsupported or outdated browser. Try a different one, like Google Chrome or Microsoft Edge.

Game runs slowly, low frame rate

Make sure you do not have Low Power Mode enabled on your device.

This can limit JavaScript speeds, especially on mobile devices.

On Microsoft Edge, this is also called 'Efficiency Mode'. On Chrome, it's called 'Energy Saver'.

Screen flickers or stays black unless paused

The canvas may flicker or disappear if an error occurs when trying to simulate certain pixels.

Pausing should fix this temporarily, during which you can delete the offending pixels, or follow the steps above to uninstall any mods.

Cannot access webpage

If you cannot access the official Sandboxels website, it could be one of a few things.

Your network connection may be unstable, make sure you are connected to the Internet with Wi-Fi or something else.

Your school or employer may be blocking the website. It would be best to contact them explaining its educational and scientific uses.

While unlikely, there could also be an outage in one of the services we use.

To play offline, check out our Offline Use Guide!

Other issues

You have a few options to get our attention!

Send us an email, join our Discord, submit to the Feedback Form, or mention us on Twitter.