Published 2026-09-29
Even a short GIF can easily go past 10MB or 20MB. Big files hit upload limits on messengers and forums, and when they do go through they take a long time to load. Once you understand a few basics, you can usually cut the size in half or more without an obvious loss in quality.
GIF is a format from 1987. Unlike modern video, it can barely take advantage of storing only what changed between frames, so it effectively saves one full picture after another. File size is roughly proportional to three things multiplied together:
Reducing size means reducing these three factors. The methods below are listed from most to least effective.
This is the first thing to do and the most reliable. GIFs made from video often carry dead time at the beginning and end. Keeping the essential 3 seconds of a 6-second GIF cuts the size roughly in half without touching any other setting.
GIFs made from video are often 24 to 30 frames per second. For reaction GIFs and short motions, 10 to 15 FPS still looks smooth. Going from 30 to 15 FPS halves the frame count and nearly halves the file size.
Fast motion such as sports or gameplay looks choppy if the frame rate drops too far. Start at 15 FPS and adjust after checking the result.
Size scales with area, so halving both width and height leaves a quarter of the pixels. For GIFs viewed on phones, 480 to 600px wide is sharp enough. Taking a 1080px original down to 540px alone makes a big difference.
If only part of the frame is moving, crop to that area. Less area means a smaller file, and viewers focus on what matters.
GIF is lossless by design, but lossy compression can blend tiny color differences you are unlikely to notice so the file compresses better. Higher strength means a smaller file but can introduce grainy noise, so compare the result and pick a comfortable level.
| Step | Method | Typical effect |
|---|---|---|
| 1 | Trim start and end | Shrinks in proportion to what you keep |
| 2 | FPS 30 to 15 | About 50% smaller |
| 3 | Half the dimensions | About 75% smaller |
| 4 | Lossy compression | Tens of percent more, depending on the scene |
These numbers are rough guides and real results depend on the scene. Apply steps 1 to 3 first since they barely affect quality, then add lossy compression only if the file is still too large.
The prezll GIF editor puts all of these in one place. Upload a GIF or WebP file (up to 20MB) and the top of the screen shows the original size next to the estimated size for your current settings, so you can see the effect of every change immediately. Files are processed in your browser and never uploaded to a server.
Shrink a GIF now