A free kart racer you play online with friends. Drift for boosts, throw bananas, fire rockets and race up to eight people on four tracks, with video chat — no download, no console.
Everyone on the couch used to need a controller and the same TV. Kosmic Kart is the kart racer you played on the couch, rebuilt to run in a browser tab — so the friends you race can be anywhere, on a laptop or a phone.
Hold a drift through a corner and it pays out a boost when you let go — hold it longer for a bigger one. Nail the start for a rocket start, do a trick off a jump, draft behind the kart ahead, and hit the dash panels.
Bananas, homing seekers, a hunter that goes after the leader, rockets, lightning, ink, a star, a ghost that steals your item, boomerangs, fireballs and more. The further back you are, the better the box.
Turn your camera on and your driver wears it, so the kart that just hit you with a banana has a grin behind it. Voice chat runs the whole race, trash talk included.
No console, no game download, no copies to buy. The race loads in the browser on a laptop or a phone, and your friends join from a link without making an account.
A nimble Bike, an all-round Kart or a heavy Quad that's hard to push around. Race at 50cc while everyone learns the tracks, or turn it up to 200cc.
Race on the big screen and open the room on your phone too, signed in as you: it becomes a controller for your kart. Or race on the phone itself, held sideways like a handheld.
Grand prix rules, one race at a time.
Up to eight racers take a seat and each picks a kart. The room's admin picks the track, the number of laps — 3 unless you change it, anywhere from 1 to 9 — the engine class from 50cc to 200cc, and whether items are on. Then they press Start: a five-second countdown, and you're off. Press the gas at just the right moment before the lights go out for a rocket start; too early and you'll stall on the line.
Drive through the item boxes to pick something up, and use it when the moment's right — drop a banana on the racing line, send a seeker at the kart ahead, or save the horn for when a hunter comes for you in first place. Pick up batteries along the way for a little extra top speed, and hold on to them: get hit and you drop a few.
Fall off the track and you're put straight back on it. Once the first racer crosses the line, everyone else has a little while to finish, and then the standings go up. Head back to the lobby, keep your seats, and go again.
Anyone who'd rather watch can spectate, and new arrivals take a seat for the next race.
What you're signing up for.
| Game | 3D kart racing, Mario Kart-style |
|---|---|
| Racers | 1 to 8 in a race; everyone else in the room can spectate |
| Tracks | Storybook Isle, Canopy Chase, Frostbite Pass, and the Summit Run sprint |
| Laps | 1–9, default 3 |
| Engine classes | 50cc, 100cc, 150cc, 200cc |
| Karts | Bike (light), Kart (all-round), Quad (heavy) |
| Items | 18, dealt by race position, or switch items off for a clean race |
| Boosts | Drift boosts, rocket starts, tricks off jumps, slipstream, dash panels |
| Keyboard | W/↑ gas, S/↓ brake, A/D or ←/→ steer, Space or Shift drift, Enter/E/F item, B look back, Tab standings, Y chat |
| Phone | On-screen gas, brake, drift and item buttons; or use your phone as a controller for a race on your computer |
| CPU racers | Not yet — bring friends |
| Video chat | Built into the room; your camera is your driver's face |
| Download | None, runs in the browser |
| Cost | Free |
Four courses, all built by Kosmi.
Flower-covered hills, candy-coloured trees and a seaside run round a little island.
A jungle track under the trees, with monkeys overhead, parrots in the leaves and dash panels on the straights.
A snowy mountain pass with icy walls, rolling boulders and rising air to glide on.
A one-way sprint through a sun-baked canyon: no laps, just start to finish in sections.
Kosmic Kart is made by Kosmi and is not affiliated with or endorsed by Nintendo; Mario Kart is a trademark of its owner.
Kosmic Kart is the closest thing: a Mario Kart-style kart racer that runs in the browser with nothing to install and no console to own. It isn't Nintendo's Mario Kart — the karts, drivers, tracks and items are all Kosmi's own — but it plays the way you'd expect: drift round the corners for a boost, grab items from the boxes and throw them at whoever is in front.
Create a Kosmi room with Kosmic Kart in it and send your friends the room link. Everyone takes a seat and picks a kart, the room's admin chooses the track, laps and engine class, and presses Start. No account is needed to join.
Yes. Every track, every kart, every item and the video chat are free, with no limit on races. Kosmi Premium exists for other things, but nothing in Kosmic Kart is paywalled.
Up to eight in a race. Anyone else in the room can spectate, and you can start a race on your own to learn a track.
W or the up arrow for gas, S or down to brake, A and D or the left and right arrows to steer, Space or Shift to drift, and Enter, E or F to use your item. B looks behind you, Tab shows the standings and Y opens chat. On a phone there are on-screen buttons, and held sideways the race sits between two controllers like a handheld console.
Eighteen, all Kosmi's own designs: bananas, bombs, a bouncing ball, a seeker that homes on the kart ahead, a hunter that flies to the leader, a rocket that drives for you, zippers, a turbo, a star, lightning that shrinks everyone else, ink, a ghost that steals, a fake item box, fireballs, a boomerang, a chomper, a horn that clears everything around you, and coins. What you get depends on where you are: the back of the pack gets the good stuff.
Yes. Open the same room on your phone, signed in to the same account, while you race on your computer, and your phone becomes a controller for your kart, with gas, drift and item buttons. You can also just race on the phone itself.
Not yet. Kosmic Kart is for racing people you invite, which is what the room link is for.
No. Kosmic Kart is made by Kosmi and isn't affiliated with or endorsed by Nintendo. Mario Kart is a trademark of Nintendo; we only use the name to describe the kind of game this is.