Resize Animated GIFs Online

Set a new width or height, keep the original aspect ratio, preview the animation, and download a resized GIF without sending the file to a server.

Related tools

Same job on a different file type or batch size. Each tool still processes the file in this browser.

Resize Every Frame, Not Just the First

Animation stays animated

A normal image resizer often saves only the first frame of a GIF. This tool decodes the complete animation, resizes each composited frame to the same dimensions, and rebuilds the GIF with its frame timing intact.

Use exact pixels or preserve the ratio

Enter a width or height and keep the aspect-ratio lock on to avoid stretching. You can unlock it when a destination truly requires exact dimensions, but changing the source proportions will distort the picture.

What Resizing Can and Cannot Do

Downsizing usually helps

Smaller dimensions mean fewer pixels per frame and can produce a smaller download. The exact size still depends on the number of frames, colors, movement, and how efficiently the source was encoded.

Enlarging does not restore detail

A larger canvas interpolates the pixels already present in each frame. It cannot recover sharpness or detail missing from the original animation, so inspect an enlarged result before publishing it.

How to resize an animated GIF?

  1. 1

    Step 1: Choose a GIF

    Select one GIF up to 20 MB. It is decoded locally on your device.

  2. 2

    Step 2: Set the Dimensions

    Enter a width or height in pixels. Keep the ratio locked unless you intentionally want to stretch the animation.

  3. 3

    Step 3: Resize and Download

    Resize every frame, compare the measured output size, preview the animation, and download the new GIF.

Reviews

Loved by Instasize Creators

One of my go-to apps

Great app for filtering photos and even greater app for sizing pictures for not only posts but story photos as well... love this app I mainly use insta size for all my posts now ;)

B
@beachxbunny

Fast and Straightforward

Resizing photos for social media should be a cinch, but most editing programs are a pain to use. Of the dozen I’ve used, Instasize is the fastest, easiest and most consistent...

S
@Soho Brad

Great Sizes

Perfect app for the exact social media picture sizes. Love it. I use it daily. & I like the premade options they give you for different social medias!

B
@Baby24doll

I love instasize

Its the best app. for sizing photos to fit for Instagram or other forms of social media. You can also edit photos and create collages with multiple photos. It’s had been my friend for several years!

J
@Jay town

Always helpful

Always helpful when needing to resize photos

L
@Leobaby96

Huge fan

I love this app. Makes posting all types of photos. Love how it makes them fit on different formats

N
@Nicola Bella

I’ve been using for years. Can’t work without it.

I use this app everyday to perfectly resize images for all of my social media platforms

T
@The Flywire

LOVE

This app saved the day for me! I’m finally able to resize my photos for IG....effortlessly

T
@Tamrinaann

Great App

We use this App weekly to resize pics for social media posts. Very user friendly, easy to use program when you want to get in and out quickly...

C
@cle957

FAQ

GIF Resizer FAQ

Can't find what you're looking for? Contact support

Yes. The tool decodes and resizes every supported frame, then creates a new animated GIF. The preview lets you verify motion and timing before downloading.

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