Free · plays in your browser · no download

The cat breeding simulator you play right in your browser

Catmaster is a free online cat breeding game. Pair cats with realistic genetics, raise rare colors and patterns, train your virtual cats and win beauty and agility shows. Start your own cattery in seconds – no download, no install.

100% free to playReal cat geneticsNo download needed
A prize-winning cat in the Catmaster online cat breeding game

A real cat breeding simulator

Everything a virtual breeder needs – from genetics to the show ring. This is what makes Catmaster more than just another cat game.

Core of the game

Breeding with real genetics

Pair your cats and pass on coat colors, patterns and temperament through realistic inheritance. Hidden traits like fertility and litter size are revealed at the vet. Chase rare mutations and build 4-generation pedigrees with official certificates.

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Cat genetics and trait inheritance

Cat shows & competitions

Enter beauty pageants and agility contests, win ribbons, tiers and achievements, and climb the global rankings against breeders worldwide.

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Training & care

Feed, care for and train your cats every day to grow their skills, form and potential before the next show.

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Shelter & adoption

Adopt orphaned kittens from the shelter, give them a home and earn rewards for helping cats in need.

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Marketplace & auctions

Buy and sell cats on the open market, bid in auctions and offer your best tomcats for breeding to other players.

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Cat breeds & Catpedia

Explore the in-game encyclopedia of cat breeds, each with its own genetics and artwork – with new breeds added over time.

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Breeder Academy

Take courses on documenting bloodlines, advanced felinology and professional training methods to become a master breeder.

Choose your cat breed

Each breed in Catmaster has its own genetics, colors and personality. More recognized breeds are on the way.

Start playing in 4 steps

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Create your cattery

Sign up free with Google or email and get your first cat in seconds.

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Breed & train

Pair cats for the traits you want, care for them daily and train them up.

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Compete & trade

Enter cat shows, climb the rankings and buy or sell cats on the market.

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Grow your dream cattery

Unlock breeds, colors and academy courses as you become a master breeder.

Frequently asked questions

Is Catmaster free to play?

Yes. Catmaster is a free cat game — completely free to play in your browser. There is an optional premium currency, but you can breed, train, compete and progress without paying anything.

Do I need to download anything?

No. Catmaster is a browser game – just open it and start playing on your computer or phone.

What is a cat breeding game?

A cat breeding game is a simulation where you pair cats and raise their kittens. In Catmaster, coat colors, patterns and traits are passed on through realistic genetics, so every litter is different.

Can I play Catmaster on my phone?

Yes. Catmaster works in any modern mobile browser – just open it and play.

How does breeding work in Catmaster?

You choose two cats to pair. Their kittens inherit colors, patterns and hidden traits like fertility and litter size following real genetic rules. You can study traits at the vet and build multi-generation pedigrees.

Start your own cattery today

Join breeders from around the world. Free to play, right in your browser – no download needed.

Play Catmaster freeAndroid app coming soon