Fix Agar.io: Not Loading, Lag, or Black Screen
Step-by-step troubleshooting to get the game working again.
Quick fixes (try these first)
- Refresh the tab and wait 10–20 seconds for assets to load.
- Open in an Incognito/Private window to rule out cache issues.
- Disable extensions (especially ad blockers/script blockers) and reload.
- Clear site data (cache/cookies) for the portal, then reload.
- Try another browser (Chrome / Edge / Firefox).
- Ensure Hardware Acceleration is enabled in browser settings.
Common issues reported by players
- won't load / black screen
- lag / high CPU usage
- screen flicker after updates
Device & hardware notes
📱 Mobile support
Yes
💻 Chromebooks
Playable in Chromebook browsers. Performance depends on hardware and server latency.
FAQs (loading & lag)
Why is Agar.io lagging?
Close background tabs/apps, lower visuals if available, and try a nearer server/region when possible.
Why is Agar.io showing a black screen?
Try clearing site data/cache, disabling extensions (especially ad blockers), or trying a different browser.
🏫 Blocked at school/work?
Some networks restrict game portals or real-time connections. If it works at home but not at school/work, try a different verified portal link or a different network.
Try a different link
Need controls help?
Keyboard layouts, trackpad tips, and fullscreen steps.
⌨️ Controls & Fullscreen Guide →