GIF Editor — Speed, Reverse & Remove Frames

Edit animated GIFs without installing anything

Animated GIFs are still the easiest way to share a short loop in chats, documentation, bug reports and forums, but they often need small fixes: the animation is too slow, it ends with a few useless frames, it should play backwards, or the file is simply too big to post. This GIF editor handles those everyday edits in one place. Drop a GIF and every frame appears as a thumbnail together with its delay, while a live preview plays the animation exactly as it will be exported.

Everything runs locally in your browser. The GIF is decoded with gifuct-js, each frame is rebuilt at full size (respecting the GIF disposal rules so partial frames display correctly), and the result is encoded again with gifenc. Nothing is uploaded, there is no watermark and no account is needed.

Speed, direction and frames

The speed multiplier scales every frame delay at once, so the rhythm of the original animation is preserved: 2× plays twice as fast, 0.5× plays at half speed. Reverse plays the frames backwards and boomerang plays them forward and then back again for a seamless ping-pong loop. Click any thumbnail to remove that frame from the output — click it again to bring it back. Remove every 2nd frame quickly halves the frame count, which is a simple way to shrink long screen recordings.

Keeping the file small

GIF file size grows with the number of frames, the pixel dimensions and the amount of change between frames. Reducing the output size to 75% or 50% has the biggest effect, followed by removing frames. Each frame is quantized to its own 256-color palette, and transparent pixels are kept. After encoding, the tool shows the original and the new size so you can try another combination before downloading. The animation always loops forever, which is what most platforms expect.