Online Tool Store
GIF Speed Changer
Change a GIF's playback speed from 0.25× to 4×, or enter a custom speed, with a lossless timing-only edit that keeps every pixel, color, and frame untouched. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Loading the sample GIF — choose your own file to replace it.
How it works
- Choose a GIF file, or use the sample.
- Pick a playback speed from 0.25× to 4×, or enter a custom speed from 0.05× to 20×.
- Preview and download the speed-changed GIF — same pixels, same colors, same file size.
The formula
New frame delay = original delay ÷ speed 2× speed → each frame shown for half as long 0.5× speed → each frame shown for twice as long
This only rewrites the delay time stored in each frame's Graphic Control Extension — the standard GIF89a metadata field that tells a viewer how long to hold each frame — so nothing about the image data itself is touched.
FAQ
How does the speed change work?
It rewrites the delay time stored for every frame — a 2× speed halves each frame's stored delay, a 0.5× speed doubles it. This is a direct edit of the GIF's own timing metadata, not a re-encode, so no palette regeneration or recompression happens.
Does changing speed reduce quality?
No. Only the per-frame delay time changes; every pixel and every color stays byte-for-byte identical to your original file. The result file is even the same size as the original, since nothing but a few timing bytes is rewritten.
Does speeding up a GIF remove frames?
No — every frame is kept, just shown for less time. The GIF format can't reliably display a frame for less than about 1/100th of a second (most browsers ignore anything under roughly 2/100ths), so this tool enforces that same floor, meaning very extreme speed-ups on very short GIFs may be capped.
Will slowing down a GIF make it smoother?
No — slowing down keeps the same frames, just displayed longer, so motion won't look any smoother than the original; it will just take longer to play through.
Is my GIF uploaded anywhere?
No — the whole speed change is a small, local file edit that runs directly in your browser's JavaScript. Nothing is sent to a server, and unlike some GIF tools, there's no separate processing engine to download or wait for first.
How we compare
| Feature | Online Tool Store | ezgif.com | OnlineGIFTools | imageonline.io |
|---|---|---|---|---|
| Lossless — only frame timing changes, pixels and palette untouched | ✓ | Not stated | Not stated | ✓ |
| File never leaves your device | ✓ | ✗ | Not stated | ✓ |
| 1× preset plus an exact custom speed value | ✓ | ✓ | ✓ | ✓ |
ezgif.com is a well-known, capable editor, but it uploads your file to its server and deletes it an hour later. This tool and imageonline.io keep the file on your device the whole time, and all three now let you dial in an exact speed beyond the quick presets.