Play osu!mania 4K Online
Import .osz files or search public mirrors and play 4K osu!mania charts instantly.
THREE STEPS
01
GET A BEATMAP
Drag an .osz file or search a community mirror. Files are never uploaded to our servers.
02
SAVED IN BROWSER
Charts and audio are saved locally in your browser so you never have to re-download.
03
PLAY INSTANTLY
Play 4K/5K/6K/7K charts with 0.001-second precision timing.
WHY RHYTHMIO
LOCAL STORAGE
Imported beatmaps and personal settings stay private in your browser.
MULTIPLAYER
Play 1v1 duels and 8-player arena matches with players who own the same map.
0.001S TIMING
Zero-delay audio and keyboard sync for true arcade-grade responsiveness.
IMPORTANT
Rhythmio is not affiliated with osu! or ppy. Beatmaps are imported locally or downloaded from third-party mirrors. Rhythmio does not host audio or chart files; all rights belong to their original creators.
FAQ
Can I play osu!mania maps in the browser?
Yes. Import an .osz or .osu file and play it instantly in your browser.
Are maps uploaded to your servers?
No. All files stay on your machine and are never uploaded to any server.
Which key modes are supported?
4K, 5K, 6K and 7K, selectable per difficulty.
Unofficial fan project · Not affiliated with osu! or ppy · https://rhythmio.net