Private GIF tool
Change GIF Speed
Make a GIF faster or slower with a fixed timing preset. Processing happens locally, so the selected GIF is never uploaded.
File
No GIF selected yet.About browser GIF speed changes
This tool runs locally with ffmpeg.wasm. It adjusts frame presentation timing, writes a new animated GIF, and creates a download link inside your browser without sending the file anywhere.
The first run downloads the roughly 31 MB media engine once. GIF timing edits are intended for short web animations, because large GIFs can use significant browser memory.
Does this upload my files?
No. Everything on this page runs locally in your browser, so your files are never uploaded to a server. Close the tab and nothing is left behind. It even keeps working if you go offline after the page loads.
This is true for every tool on this site. Curious how that works? Read how browser-side processing works.
FAQ
Are GIF files uploaded to change speed?
No. The timing change runs locally in your browser and the output downloads from a local blob URL.
Which values make the GIF faster?
2x and 4x make the GIF faster. 0.5x and 0.25x slow the animation down.
Why does the first run download an engine?
Changing timing uses ffmpeg.wasm. The roughly 31 MB engine is downloaded once per tab session and then reused.
Can this handle long GIFs?
It is best for short GIFs. Long animations can be slow and memory-heavy in a browser tab.