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Updated June 2022
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BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own. Read more  
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own. Read more  
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We buy all products with our own funds, and we never accept free products from manufacturers.Read more 
Bottom line
Pros
Cons
Best of the Best
PetSafe Cat Door for Interior or Exterior Doors
PetSafe
Cat Door for Interior or Exterior Doors
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Most Versatile
Bottom Line

Versatile door that you can adjust to your needs.

Pros

Designed to be used as an exterior or interior door. Its large flap opening works for cats and dogs up to 25 pounds. This cat door is made of high-impact plastic and can withstand frequent use without getting damaged. The flap on this door is transparent so your cat will get used to it more quickly. This door features a 4-way locking system that allows you to control your cat's comings and goings.

Cons

Can be loud and might scare some cats at first.

Best Bang for the Buck
Depets Cat Flap Door for Interior and Exterior Doors
Depets
Cat Flap Door for Interior and Exterior Doors
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Simple Yet Solid
Bottom Line

An affordable and versatile option.

Pros

This cat door has a transparent flap that lets pets see where they are going so they won't be afraid to use it. The exterior of the flap is waterproof. This door has a clever brush strip that reduces noise from the door’s opening and closing. Made of ABS plastic that’s weather-resistant and very durable. Use the four lock modes to allow only entry or exit, both, or neither.

Cons

Not good for small kittens.

PetSafe Cat Door for Interior Door
PetSafe
Cat Door for Interior Door
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Bargain Pick
Bottom Line

A good choice for greater pet privacy.

Pros

Let your kitty come and go while you keep the human doors closed. This pet door has a transparent flap that your cat will learn to use quickly. Easily fits any interior door between one-half and two inches thick. The high-impact frame can handle many entries and exits.

Cons

Some users say that their cat managed to open the door even when it was locked.

Purrfect Portal Cat Door for Interior Doors with Grooming Brush
Purrfect Portal
Cat Door for Interior Doors with Grooming Brush
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Feature-Packed
Bottom Line

A useful door that also keeps your cat groomed.

Pros

Larger than most cat doors, so it’s great for big cats. Simple installation. Four screws hold the door securely in place. Includes an internal brush that helps to keep your cat groomed and cuts down on loose cat hair around the house. This cat door fits any solid or hollow human door between 1.25 and 1.75 inches in thickness.

Cons

Not as elegant as other designs.

The Kitty Pass Interior Cat Door
The Kitty Pass
Interior Cat Door
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Most Fun
Bottom Line

Super cute, no-fuss design that’s easy to use.

Pros

A safe way to let your cat in and out of closed doors. The wide opening allows your cat to pass through easily. An amusing design that looks like your kitty's ears. This door measures 7 1/2 inches by 6 1/2 inches and is good for cats up to 20 pounds. This cat door will fit all standard hollow and solid interior doors.

Cons

This cat door can't be closed.

HOW WE TESTED

We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.

30
Models
Considered
60
Consumers
Consulted
20
Hours
Researched
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Our Top Picks