How to change a GIF's speed
- Choose a GIF, or drop it on the box above.
- Drag the slider: right to speed it up, left to slow it down. The new running time shows underneath.
- Press Change speed, check the result and download it.
How GIF speed works
A GIF has no frame rate. Each frame carries its own delay in hundredths of a second, and the browser waits that long before showing the next one. Changing the speed rescales every delay, so a frame shown for 100 ms becomes 50 ms at 2x or 200 ms at 0.5x. The pictures are not touched, so there is no loss of quality.
There is one catch. Browsers treat any delay under 20 ms as 100 ms, which would make a sped-up GIF suddenly crawl. When a speed-up would cross that line, this tool drops frames instead and keeps the total running time right, so the GIF really does play faster.
Questions
Why is my sped-up GIF smaller?
At high speeds some frames are dropped (see above), and fewer frames means a smaller file.
Can I slow it down without it looking choppy?
Slowing down shows each frame for longer, so motion gets steppier below about half speed. That is how GIFs work: there are no in-between frames to add.
Is my GIF uploaded?
No. The timing is changed in your browser and the file never leaves your device.