Grinch Pet AI

Grinch my pet without editing: upload one dog or cat photo and get your pet back with green fur, a sly grin and a Christmas outfit, its ears, eyes and markings still its own.

  • No prompt
  • No app
  • Cats & dogs
A corgi with bright green fur and a sly grin, a red Santa hat between its big upright ears and a red knit scarf, sitting on a sunny kitchen floor
Photo in
Example · Green grump

PNG / JPG / WebP · up to 10 MB · at least 512px on the short side

0/1 photos

One dog or cat on its own, ears and muzzle in view, ideally ears to paws. You get one photo back: the same pet, green, grinning and dressed for Christmas.

Photo settings

No prompt needed. Upload a photo of your own pet; film stills and cartoon characters aren't allowed.

Grinch cat or dog: will it still look like your pet?

One look, used as a Grinch dog filter and a Grinch cat filter alike: four coats in four rooms, each card beside the photo it came from, naming what stayed the pet's own once the fur went green.

A fluffy Pomeranian with lime-green fur, a sly grin, a red Santa hat and a red knit scarf, sitting on a cream boucle armchairFluffy coat

Before

  • Orange-cream Pomeranian sitting on a cream boucle armchair in a bright living room
    Your pet

Pomeranian: fox face and fluff

The pointed fox face, small upright ears, round black eyes and the cloud of fur all come through. It sits on the same cream armchair; only the orange coat is now lime green.

A sleek cat with deep green fur and amber eyes, a red Santa hat between its upright ears and a red scarf, sitting on a pale wooden window seatBlack fur

Before

  • Black cat with amber eyes sitting on a pale wooden window seat by a garden window
    Your pet

Black cat: amber eyes stay bright

Black is the hardest coat to recolour. Lit by the window, it turns a deep green that still shows the fur and the shape of the face, and the amber eyes, nose and whiskers stay sharp.

A tabby cat with bright green fur, dark green stripes and white paws, wearing a red Santa hat and scarf, lying on a powder-blue sofa with a half-closed-eye grinTabby stripes

Before

  • Brown tabby cat with white paws lying on a powder-blue sofa
    Your pet

Tabby: every stripe in its place

The swirls come back as dark green on bright green, right where they were, and the white socks stay white. The stretched-out pose on the blue sofa does not move.

A curly goldendoodle with green curls and long floppy ears, a red Santa hat and a red scarf, sitting on a woven runner in a white hallwayCurly coat

Before

  • Apricot goldendoodle sitting on a woven runner in a bright white hallway
    Your pet

Doodle: curls and floppy ears

Every curl keeps its shape, the long floppy ears still frame the face and the eyes stay clear under the fringe. Same sit, same rug, same hallway.

Christmas pet photos without the green fur

What is the Grinch pet filter?

The Grinch pet filter, also searched as “grinch my pet”, turns your own dog or cat Grinch green: green fur, a sly grin and a Santa hat, still recognisably your pet. On TikTok it is posted as a before-and-after reveal video; this effect makes the after as one photo.

Left, a tricolour beagle sitting on a white bed; right, the same beagle with green fur in light and dark patches, a red Santa hat and scarf and a sly grin

The joke is the contrast. The sweetest pet in the house suddenly looks ready to steal the presents, and owners caption it with the pet's name and its opposite, along the lines of “she could never be mean”.

Grinch-style pet pictures have come around for a few Christmases already, as 3D cats, cartoons and Grinchmas scenes. The 2026 wave is different: owners post their own pets, first as they are, then green.

Setup: the everyday pet

An ordinary photo of the pet, looking as sweet as it does every day.

Payoff: the green reveal

The same pet, green and grinning in a Santa hat. On TikTok the reveal lands right after the before, set to the trending sound; post your before and this photo together and add that sound from TikTok's library.

November 2026 on TikTok

  1. @lewisbrownnew666 posts the video whose original sound the pet reveals now use.

  2. AI reveals of people's own dogs and cats start appearing from several accounts, @trickytrick70 among them.

  3. Reveals posted by @nimala_nisanta06 and @alizia910 reach about 52,500 and 41,400 plays by the next day.

  4. About 12,000 TikTok videos use the sound; 54 of the 59 posts readable that day were under three days old.

Sources: post dates from the TikTok post IDs; plays and the video count read on TikTok on November 10, 2026.

How to Grinch your pet from one photo

Ears, eyes and muzzle are what keep the green pet yours, so every check below is about keeping them in view.

  1. Pembroke Welsh corgi with a red-gold and white coat sitting on terracotta tiles in a sunny white kitchen, big ears up

    1 photoYour pet

    This photo is the whole cast: your pet's ears, eyes, muzzle, markings, body shape and pose, plus the room around it. The look only turns the fur green, adds a sly grin and dresses it for Christmas.

    • Ears to paws in the frame, so the outfit has room
    • Short side at least 512 px

Pet photo check

Works well

  • A Shiba Inu sitting and facing the camera on a white backgroundOne dog or cat, alone in the frame
  • Ginger tabby cat sitting upright and facing the camera on a white background, ears, eyes and muzzle in viewEars, eyes and muzzle all in view
  • Black cat with amber eyes sitting on a white background in soft, even lightEven light on the face, black fur included
  • Cream curly-coated poodle mix on a white background, both eyes uncoveredCurls or long fur clear of the eyes

Avoid

  • A hand holding a golden retriever's muzzle shut in a living roomA hand over the muzzle
  • A dog and a cat cuddled together in one photoTwo pets in one photo
  • A grey cat's face filling the frame, no body visibleJust the face, no body for the outfit
  • Blurry brown terrier running through a dark living roomA dim room or a pet on the move

Slot, size, save

  1. Add the pet photo

    Tap the photo slot and pick one picture of the dog or cat you want to turn into the Grinch; it shows in the frame before anything runs.

  2. Pick a size, then Generate

    Auto keeps the photo's own framing. The Generate button shows the exact price before you start.

  3. Download it, or animate it

    Save the photo for your reveal post. Animate it, under the result, opens the Animate Christmas Photo template with the photo already added; that video is a separate run with its own price.

A Grinch pet filter prompt you can paste

Running the Grinch pet filter in another image editor? This is the instruction behind every example on this page. Here you never type it; elsewhere, attach one pet photo as image 1 in a model that edits photos from text, such as GPT Image, and paste it.

Photo edit · one photo (image 1)

Prompt length 1854

Edit image 1 into a festive photo of the exact same dog or cat, turned into a Grinch-style holiday grump. Keep the pet instantly recognizable to its owner: the same species and breed, head shape, ear shape, size and position, eye shape, eye colour and spacing, muzzle length, nose shape, whiskers, body shape and size, tail, and the layout of its markings, which stay as lighter and darker patches in the same places. Keep the pose, the camera angle, the framing and the room from the photo, with the same furniture and light. Change only three things. The fur: the whole coat turns a rich Grinch green, from deep moss to bright lime, keeping its own length, texture and fluff, darker green where the fur was dark and lighter green where it was light; a black or very dark coat becomes a deep but clearly green shade with its fur texture and the shape of the face easy to read. The eyes, the nose pad, the inside of the ears and the paw pads keep their natural colours. The face: a sly, mischievous grin made with the pet's own mouth, its corners curling up, and the eyes narrowed a little in a knowing look. The outfit: an original red-and-white Christmas outfit sized to the pet, a small red knit scarf or a little red vest with a white fluffy trim, and a tiny red Santa hat with a white pom, tilted to one side between or beside the ears so both ears stay fully visible in their own shape and position.
The pet stays a real animal: its own animal nose and mouth, no human teeth, lips, nose, eyebrows or hands, the same number of legs, paws and tails as in the photo with none added, and it only stands upright if the photo shows it. Photorealistic photo with real fur detail. No text, titles, lettering, logos or watermarks. Draw no character from books, films or ads, and no copy of their costumes. Do not add any people, other animals or characters.

Keep in the prompt

  • Markings as light and dark patches

    Saying the markings stay as lighter and darker patches in the same places is how a tabby keeps its stripes in green.

  • A grin from the pet's own mouth

    Asking for the corners of its own mouth to curl up keeps the grin a dog or cat grin, not human teeth.

  • The pose and the room

    Keeping the pose, angle, framing and room means the reveal lines up with the before photo in your post.

Leave out

  • The character's name as the goal

    “Make my dog the Grinch” invites the character's own face, hands and costume, and your pet gets lost.

  • Nothing about dark fur

    A black coat can come out flat and murky; the dark-coat line asks for a clearly green shade with texture.

  • Nothing against lettering

    The look is named after a film, so the model may add a title or a logo; “No text, titles, lettering, logos” keeps the photo clean for your post.

A short prompt next to this one

Too short

Make my dog the Grinch.

Better

Edit image 1: keep this exact dog, its ears, eyes, muzzle and markings; turn the fur Grinch green, add a sly grin with its own mouth and a tiny red Santa hat beside the ears.

The short version names the character and says nothing about your pet, so the model is free to draw a green creature instead of your dog.

Grinch pet photo sizes, files and credits

Grinch pet photo sizes, files and credits
Photos
1 photo of one dog or cat
Photo files
PNG / JPG / WebP, up to 10 MB, short side at least 512 px
Look
Green grump
Output
1 still photo per run, with no sound or motion
Aspect ratio
Auto, 1:1, 4:3, 3:4, 16:9, 9:16, 21:9, or 9:21; Auto by default
Resolution
1K, 2K, or 4K; 1K by default
Credits
3 credits at 1K, 4 credits at 2K, and 5 credits at 4K
Failed runs
If a run fails, its credits come back automatically
Visibility
Private: results stay out of the public gallery on every plan

More trending AI video effects

Every template works the same way: add your photos, press Generate and get a shareable video without writing a prompt.

View all effects

Grinch my pet app and filter questions

Is Grinch Pet AI free?+

No, each photo costs credits. The price depends on the resolution you pick, and the Generate button shows the exact amount before anything runs. New accounts get 10 credits when they sign up.

Do I need a Grinch my pet app?+

No. It runs in your browser on a phone or a computer, so there is nothing to install. It is not a CapCut template either: you download a finished photo and post it wherever you like.

Do I get a picture or a video?+

A picture: one still photo per run, with no sound, motion or film title. Making it move is a separate video run, started from Animate it under the result.

Does it work on cats as well as dogs?+

Yes. The same look is built for one dog or one cat, with the outfit sized to the animal; the examples above include a black cat and a tabby next to two dogs, each keeping its own nose, whiskers and ears.

Will my pet keep its colours and markings?+

Not its colours: turning the coat green is the whole effect. The layout stays, so stripes, patches and white markings keep their places as darker, lighter or white areas, and the eyes and nose keep their own colour.

Why doesn't my pet look like itself?+

The model recolours every hair and adds a grin in one go, and sometimes it overdoes it: a grin that looks too human, a hat pulled over an ear or a marking smoothed away. Dark, blurry or tightly cropped photos make that more likely; check the photo list above and run it again with a clearer shot.

Can I Grinch two pets in one photo?+

No. The look is built for one animal. Crop a shared photo into one picture per pet, run each one, and post them side by side.

Is this the Grinch's dog, Max?+

No. It recolours and dresses your own pet; it does not draw Max, his antler or any costume from the book or the films.

Is this an official Grinch filter?+

No. Grinch Pet AI is an Oeneo AI effect named after the trend, with no connection to the book or the films.

Can I change the outfit or write my own prompt?+

Not on this page: the look is fixed so it works in one tap. To change it, copy the prompt above into the AI Image Generator, attach your pet photo and edit the outfit line.

Which size should I pick for a TikTok or Reels post?+

Auto keeps your photo's own framing and is the safest choice. 9:16 fills a phone screen, but if your photo is wider, the model has to paint extra room above and below the pet.

Make a Grinch pet photo of your own dog or cat

One pet photo in, one green, grinning holiday grump out, ready to post right after the before.

Grinch my petSee the coat examples