Why make a GIF from a video
An animated GIF behaves like an image rather than a video. It plays by itself, loops forever, needs no player or play button, and can go into many places that accept pictures but not video: chat apps, forums, documentation pages, slide decks and project readme files. That makes it the classic format for reactions, short product demos, interface walkthroughs and how-to snippets.
The price is efficiency. GIF dates from the late 1980s, stores every frame with at most 256 colours and compresses far less effectively than modern video. A GIF is therefore usually much larger than the video clip it came from, and its colours look flatter.
The four settings, and how they affect size
GIF files grow quickly, so the settings are about choosing the smallest clip that still tells the story.
- Start time: where in the video the GIF begins.
- Length: up to 30 seconds. Every extra second adds more frames, so most good GIFs last only a few seconds.
- Width: 320, 480 or 640 pixels, with 480 as the default. A wider GIF has more pixels in every frame, and the file grows accordingly.
- Frame rate: 10, 12, 15 or 20 frames per second, with 12 as the default. Higher rates look smoother and add frames.
The arithmetic is simple: a 5-second GIF at 12 fps contains 60 frames, while 30 seconds at 20 fps means 600. For screen recordings and slow movement, 10 or 12 fps at 480 pixels usually looks fine; keep 15 or 20 fps and 640 pixels for fast motion where smoothness really matters.
What to expect from the colours
Each GIF frame can use at most 256 colours, while a video frame can show millions. The conversion therefore has to reduce every frame to a limited palette. Flat graphics, interface recordings, cartoons and text usually come through well. Skies, skin tones, gradients, smoke and low-light scenes are harder: expect visible steps or grainy patterns in smooth areas.
Sound is dropped, because GIF has no audio. And the GIF loops forever by design, which suits short, repeating moments better than clips with a clear beginning and end.
MP4 vs GIF
| MP4 video | Animated GIF | |
|---|---|---|
| Colours | Millions | Up to 256 per frame |
| Sound | Yes | No |
| File size for the same clip | Small | Usually much larger |
| Looping | Only if the player loops it | Loops forever by itself |
| Needs a player | Yes | No; it displays like an image |
| Best for | Longer clips, full quality, sound | Short silent loops, reactions, demos |
When a GIF is the wrong choice
If the destination accepts video, an MP4 is usually the better file: smaller, sharper and in full colour. Many sites that appear to show GIFs actually play short, muted videos. If you already have a GIF that is too heavy, GIF to MP4 turns it into a much smaller video.
If you need the sound rather than the pictures, use MP4 to MP3. And always keep the original video: a GIF is a heavily simplified copy, and the full-quality clip cannot be rebuilt from it.
The source can be any video your browser can play, including MP4, WebM and MOV with H.264 video, up to 1 GB. It is decoded and turned into a GIF on your device, without being uploaded.