How to Reduce GIF File Size

Why GIFs get so big

GIF is a format from 1989. It stores a palette of up to 256 colours and compresses each frame with an old lossless method (LZW). What it lacks is the motion compression that modern video uses — the trick where a codec stores only what changed between frames. That single missing feature is why a few seconds of GIF can be larger than a minute of MP4.

So shrinking a GIF is really about giving it less to store: fewer frames, fewer pixels per frame, and fewer colours. Every tip below is a version of that idea.

1. Trim the length (biggest lever)

File size scales almost linearly with the number of frames, and length is the most direct way to cut frames. A 10-second GIF trimmed to 3 seconds is roughly a third of the size — before you touch any other setting.

Most GIFs are better short anyway. Trim to the exact beat that matters and you improve both the file size and the GIF.

2. Lower the frame rate

Frame rate (FPS) is the other half of the frame count. Dropping from 30 FPS to 15 roughly halves the frames — and most GIFs look fine at 15, or even 10 for slower clips.

High frame rates only pay off for fast, smooth motion. For a talking-head reaction or a screen demo, 10–15 FPS is plenty and noticeably smaller.

3. Reduce the dimensions

Pixels are stored per frame, so width and height hit size hard. Halving the width roughly quarters the pixel count. Dropping a 1080p source to 480–640px wide is usually invisible at the size GIFs are actually viewed.

Never upscale — it adds size and invents no real detail.

4. Optimize the colour palette

GIF is capped at 256 colours. A smart converter builds a custom palette tuned to your specific clip rather than using a generic one, which keeps it looking right while squeezing the file. Turn on Optimize palette for this.

Flat graphics, UI, and cartoons compress especially well because they use few colours to begin with. Detailed live-action footage benefits most from the custom palette.

5. Ask whether it needs to be a GIF at all

If your destination accepts video, an MP4 or WebM of the same clip is typically 5–10× smaller at higher quality. Use a GIF when you specifically need inline autoplay-and-loop with no player; otherwise video wins on size.

A quick recipe

When a GIF is too big, apply the levers in this order:

1. Trim to the shortest clip that still works.
2. Drop the frame rate to 15 (or 10 for slow motion).
3. Reduce the width to 480px.
4. Turn on Optimize palette.
5. Still too big? Shorten it further — length is king.