Upload an animated GIF and pick a playback speed. Frame delays are rewritten directly in the file, so pixel quality never changes.
Every frame in an animated GIF has a small Graphic Control Extension block that stores its delay time in hundredths of a second. This tool scans the file byte by byte, finds each of those blocks, and divides or multiplies the stored delay by your chosen speed factor. Because the actual pixel data for every frame is left completely alone, the visual quality of the GIF never changes — only how quickly the frames play back.
Speed up a slow clip to 2x or 3x for a punchier loop without losing any detail.
Slow a fast screen-capture GIF down to 0.5x or 0.25x so viewers can actually follow along.
No. The tool only rewrites the per-frame delay values inside the file's existing Graphic Control Extension blocks. The image data is never touched, so quality is unaffected.
Because only a couple of bytes per frame change, the file size stays essentially identical to the original.
A 0 delay usually means "play as fast as the browser allows." Speeding those up further has no effect; slowing down treats them as a 100ms baseline before scaling.
No. The file is read and rewritten entirely in your browser using the File and Blob APIs.
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