GIF Speed Changer

Upload an animated GIF or WebP and enter a speed above 1. A speed of 2 halves every frame delay, so the animation plays twice as fast; the default is 2. The frames themselves are not changed or dropped.

Enter a speed below 1. A speed of 0.5 doubles every frame delay, so the animation plays at half speed, and the lowest value, 0.1, makes it ten times slower.

When you enter a delay between 20 and 10000 milliseconds, every frame gets that delay and the speed value is ignored. This evens out animations with irregular timing, for example 100 milliseconds for a steady 10 frames per second.

Browsers play GIF frames with a delay below 20 milliseconds at 100 milliseconds instead, which would make a sped up GIF suddenly play slower. The tool never writes delays below 20 milliseconds. Original frames that use such tiny delays are treated as 100 milliseconds, the way browsers show them, before the speed is applied.

GIF stores delays in hundredths of a second, so GIF results use multiples of 10 milliseconds. Animated WebP stores milliseconds, so WebP results keep the exact calculated delays.

No, the animation keeps its loop setting, whether it loops forever or a fixed number of times. Only the frame delays change.

The frames are encoded again with their new timing. GIF frames get a freshly computed palette that keeps their look, and animated WebP is saved at quality 90, which is very close to the original.

No, the image needs at least two frames, because a single frame has no timing to change. Still GIF or WebP files are rejected with an explanation.

Uploads can be up to 5 MB with up to 300 frames, up to 2000 pixels per side and up to 16 megapixels across all frames. Only GIF and WebP files are accepted.

Not really, because the file still contains the same frames. To reduce the size, remove pixels with the GIF Resizer or colors with the GIF Compressor.