GIF Speed Changer

GIF animations control motion pacing through per-frame delay values encoded in hundredths of a second. When an animation plays too slowly or races past critical visual details, adjusting playback speed becomes necessary without altering the total frame count. Web browsers enforce a lower limit of twenty milliseconds per frame delay; values lower than this threshold are rounded up to one hundred milliseconds, causing excessively accelerated animations to stutter. Speed adjustments modify timing metadata rather than dropping graphics data, meaning visual fidelity and the standard 256-colour indexed palette remain intact without introducing recompression artifacts.

This tool decodes each GIF frame locally in your browser and recalculates timestamp delays using your chosen speed multiplier. Doubling the speed halves the delay per frame, while slowing down an animation extends delays without generating interpolated in-between frames. Because the underlying image pixels and palette entries are preserved during timing adjustments, transparency masks and visual sharpness stay identical to the source file. However, non-standard embedded metadata like camera tags or custom application extensions are discarded during re-encoding. The entire process runs strictly client-side on your device without server uploads.