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Free Online GIF Optimizer and Size Reducer

Reduce the file size of a GIF free without uploading it. Frames, width, colours and dithering are the only levers a GIF has, and all four are here with what each one costs explained, including the dithering setting that often halves a file on its own.

Free Forever Nothing Uploaded Real Levers Proper Palette

Free Online GIF Optimizer and Size Reducer

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Drop a GIF here to make it smaller Frames, size and colours, with what each one costs shown. Nothing is uploaded. Select a Video MP4, MOV, WebM, MKV, AVI and more • best under 300 MB • nothing is uploaded

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The three levers

Frames a secondas it is Halving this roughly halves the file. Below about ten it starts to look like a slideshow.

Widthas it is The strongest lever of the three, because it cuts in both directions at once.

Colours256 A GIF can hold 256 at most. Flat artwork often looks identical at 64 and is much smaller.

Dithering This is the lever nobody expects. Dithering adds noise to every frame, and noise does not compress, so switching it off can halve the file.

Output

Encoder

File name

.gif

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How to Make a GIF Smaller

Drop it, move three sliders, download.

Drop the GIF in It is opened by your browser and never uploaded, and its current size and frame rate are read from the file.

Start with the width It is the strongest of the three levers, because reducing it cuts pixels in both directions at once.

Then frames, then colours Halving the frame rate roughly halves the file. Flat artwork usually survives sixty four colours without a visible change.

Try it without dithering Dithering puts noise in every frame and noise does not compress. Switching it off is often the single biggest saving.

Where a GIF Actually Gets Its Size

Three levers, and one that surprises people.

There is no quality slider, because a GIF has no quality setting. Unlike a JPEG, a GIF is not compressed by throwing detail away. Every frame is a picture limited to 256 colours, packed losslessly. The only ways to make one smaller are fewer frames, fewer pixels and fewer colours.

Dithering is the surprise. It scatters pixels to fake colours the palette does not have, which looks better but puts noise into every frame, and the packing GIF uses cannot compress noise. Turning it off often halves the file, at the cost of visible bands in gradients.

Width is the strongest lever. Halving the width removes three quarters of the pixels, not half, because it cuts in both directions at once. Nothing else here gets close.

Fewer colours costs less than people expect on flat artwork. Logos, screen recordings and line drawings often look identical at sixty four colours. Photographs and gradients are where the loss shows.

If size really matters, the answer is not a GIF. The same clip as an MP4 is usually a tenth of the size and looks better. The GIF is worth keeping only where a real video will not play, which is fewer places than it used to be.

The work happens on your own machine. Your video is opened by this page, not sent anywhere. That is why there is no upload bar, no queue and no waiting for a server. It is also why a big file leans on your own processor: nothing is being done for you somewhere else.

There is a real size ceiling, and it is your device, not us. The whole video has to fit in the browser's memory while it is being worked on, so roughly three hundred megabytes is comfortable on a laptop and far less on a phone. This page tells you where you stand the moment you pick a file.

The first run downloads the engine, later runs do not. Video work needs a real encoder, and that is a thirty megabyte download the first time you press the button. Your browser keeps it, so the second video starts straight away.

Leave the tab open. All of the work is in this page, so closing it or navigating away stops the job halfway. On a phone, switching apps can do the same thing, because the system is allowed to pause a background tab.

Key Features & Capabilities

What this tool does, and what it deliberately does not.

Nothing uploaded FFmpeg runs inside your browser as WebAssembly, so the file never reaches a server.

The real levers, shown Frames, size, colours and dithering, with what each one costs explained instead of hidden behind a percentage.

A proper palette The palette is rebuilt from your own frames rather than a generic one, which is what keeps a reduced GIF looking right.

Dithering is a choice The setting that most tools bury, and often the one that halves the file.

Honest about GIFs Where a real video would be smaller and better, this page says so rather than pretending otherwise.

Your original is safe A new file is written and the one you dropped is never modified.

About the GIF Optimizer

Making a GIF smaller is a different job from making a JPEG or an MP4 smaller, and the difference catches people out. Those formats compress by discarding detail you are unlikely to notice, and their quality slider decides how much. A GIF does not do that at all. Each frame is a picture restricted to at most 256 colours, packed with a lossless method, which means there is no quality dial to turn.

What there is instead are three levers. Fewer frames a second, fewer pixels, and fewer colours. Width is the strongest by a distance, because reducing it cuts in both directions at once: halve the width and three quarters of the pixels are gone. Frame rate is roughly linear, and colours cost less than people expect on flat artwork while showing badly on photographs.

The fourth control is the one most tools hide, and it is often the biggest saving of all. Dithering scatters pixels to imitate colours the palette does not have, which looks smoother to the eye but puts noise into every single frame, and the packing a GIF uses cannot compress noise. Turning dithering off can halve a file outright, at the cost of visible banding in gradients.

And one honest note: if size is the real problem, a GIF may be the wrong format. The same clip as an MP4 is usually a tenth of the size and looks better. A GIF earns its place where a video will not play at all, which is fewer places than it used to be.

Frequently Asked Questions

Colours, frames, dithering and why there is no quality slider.

Drop it here and reduce the width, the frame rate and the number of colours. Those three are the only levers a GIF has, and this page shows all of them.

Because a GIF has no quality setting. It is not compressed by throwing detail away like a JPEG. Every frame is a picture limited to 256 colours, packed losslessly.

It scatters pixels to fake colours the palette does not contain. It looks better but adds noise to every frame, and noise does not compress. Turning it off often halves the file.

Flat artwork, logos and screen recordings often look identical at sixty four. Photographs and gradients are where fewer colours start to show.

The width. Halving it removes three quarters of the pixels because it cuts in both directions at once.

Often not. The same clip as an MP4 is usually a tenth of the size and looks better. A GIF is worth it only where a real video will not play.