Free Tool

See What Your Dog Sees

Q: Is this dog vision simulator scientifically accurate?

It is a research-guided approximation. We simulate canine colour vision using a transformation based on human deuteranopia, which peer-reviewed studies identify as the closest well-understood match to how dogs perceive colour, plus a blur to reflect dogs' lower visual acuity. It is designed to be a faithful illustration, not a literal recording of your dog's brain.

Upload a photo and watch it transform into your dog’s view of the world — dichromatic blue-and-yellow vision, based on peer-reviewed canine research. Your photo never leaves your device.

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Upload a photoor drag & drop — a dog, a toy, a park, anything

Blue & yellow onlyDogs have two colour receptors, not three — their world is built from blues and yellows.

Red vanishesReds and greens blur into muddy brown-grey. That red toy on green grass? Nearly invisible to them.

Softer focusDogs see 4–8× less detail than we do, so their view is gentler and less sharp.

Based on canine dichromatic-vision research (Royal Society Open Science, 2017) — dog colour vision closely matches human red-green deuteranopia. A scientifically-guided approximation, not a literal window into your dog’s brain.

Free Interactive Tool

Dog Vision Simulator: See What Your Dog Actually Sees

Ever wondered what the world looks like through your dog’s eyes? Dogs don’t see in black and white — that’s a myth — but they don’t see the rainbow the way you do either. Upload any photo below and our free dog vision simulator shows you their real view of the world, based on peer-reviewed research into canine colour perception. It runs entirely in your browser, so your photo never leaves your device.

How dogs really see the world

Humans are trichromats: we have three types of colour-detecting cone cells, letting us see the full spectrum from red to violet. Dogs are dichromats — they have only two cone types. In practical terms, a dog’s colour vision is remarkably similar to a human with red-green colour blindness (deuteranopia). Their world is painted almost entirely in blues and yellows.

That single difference changes everything about how your dog experiences a scene:

Reds and greens collapse together. A bright red ball sitting on green grass — obvious to you — turns into two similar muddy brown-yellow shapes for your dog. This is exactly why your dog sometimes runs straight past a toy you can see clearly: on grass, a red toy nearly disappears.
Blue and yellow stay vivid. These are the colours dogs see best. It’s no accident that many of the toys dogs track most easily in the yard are blue or yellow.
Everything is a little softer. Dogs have roughly four to eight times less visual acuity than humans, so fine detail is gentler and less sharp — though their motion detection and low-light vision far outperform ours.

Why does your dog see fewer colours?

It comes down to cone cells in the retina. Research estimates a dog’s two cone types are most sensitive to light around 429 nanometres (blue) and 555 nanometres (yellow-green). With no dedicated red-sensitive cone, wavelengths from red through green all get compressed into a similar band — which is why reds read as dark brown-grey and greens read as dull yellow. Our simulator recreates this using a colour transformation modelled on human deuteranopia, the closest well-studied match to canine vision.

What colours should you actually buy for your dog?

Once you’ve seen the simulation, the practical takeaway is simple: choose blue and yellow. Toys, beds, training equipment and treat pouches in blue or yellow stand out vividly to your dog, while red and orange items can blend into grass, carpet, or dirt. If your dog seems to “lose” a toy that’s right in front of them, colour — not stubbornness — is often the reason.

Turn the way you see your dog into something you’ll keep

Seeing the world through your dog’s eyes is a reminder of how uniquely they experience life beside you. At Pawtrait, we turn that bond into custom art — upload a favourite photo and see your pet reimagined in dozens of styles in about a minute. [EDIT-LINK] Create your pet’s portrait →

Frequently asked questions

Are dogs colour blind?

Not completely. Dogs aren’t blind to colour and they don’t see in black and white — that’s a common myth. They’re dichromatic, meaning they see a narrower range than humans, dominated by blues and yellows, and struggle to tell reds and greens apart. It’s very similar to red-green colour blindness in people.

What colours can dogs see best?

Blue and yellow. These are the two colours a dog’s eyes are built to detect, so blue and yellow objects appear vivid and easy to spot. Reds, oranges and greens are much harder for dogs to distinguish and often look like muddy brown or grey.

Can dogs see red?

Not as red. Because dogs lack a red-sensitive cone, red objects appear as a dark brownish-grey rather than the bright red you see. This is why a red toy can seem to vanish against green grass in your dog’s view.

Is this dog vision simulator scientifically accurate?

It’s a research-guided approximation. We simulate canine colour vision using a transformation based on human deuteranopia, which peer-reviewed studies identify as the closest well-understood match to how dogs perceive colour, plus a blur to reflect dogs’ lower visual acuity. It’s designed to be a faithful illustration, not a literal recording of your dog’s brain.

Does the tool upload or store my photo?

No. The entire simulation happens inside your own browser. Your photo is never uploaded, stored, or shared — it stays on your device.