The free cat breeding simulator you play in your browser
Catmaster is a free online cat breeding game. Play as a cat breeder: 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 play
- Real cat genetics
- No download needed
Beautiful cat breeds, each with its own genetics
Start with a Ragdoll, an American Shorthair, a Chartreux or a Norwegian Forest Cat and build a cattery as big as you like. Every breed has its own colors, patterns and personality, described in the in-game Catpedia, and new recognized breeds are added over time.
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Breeding with real cat 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 four-generation pedigrees with official certificates.
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Cat shows, agility contests and rankings
Feed, care for and train your cats every day to grow their skills and form. Then enter beauty pageants and agility contests, win ribbons, medals, champion titles and achievements, and climb the global player ranking against breeders from around the world.
Learn moreTrade cats with other players
Buy and sell cats on the open market and offer your best tomcats for breeding to other players. Every cat you sell carries its real pedigree and genetics, so a well-bred line is worth real in-game money.
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Shelter, adoption and daily rewards
Adopt cats given up by other breeders, give them a new home and earn rewards for helping cats in need. Daily quests, streaks and achievements reward regular care, and the Breeder Academy teaches you advanced felinology step by step.
Learn moreStart playing in 4 steps
- 1
Create your cattery
Sign up free with Google or email and get your first breeding pair in seconds.
- 2
Breed and train
Pair cats for the traits you want, care for them daily and train them up.
- 3
Compete and trade
Enter cat shows, climb the rankings and buy or sell cats on the market.
- 4
Grow your dream cattery
Unlock academy courses and earn champion titles 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 play on your computer or phone. An Android app is also available on Google Play.
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 and as an app on Google Play. Your cattery is the same everywhere.
How does breeding work in Catmaster?
You choose two cats to pair. Their kittens inherit colors and patterns following real genetic rules and take after their parents’ hidden traits like fertility and litter size. You can study traits at the vet and build multi-generation pedigrees.