GIF Speed Changer — Adjust Animation Speed
Speed up fast-paced animations or slow down intricate motion graphics from 0.25× up to 4×. GIF timing is stored in centiseconds (multiples of 10 ms), meaning delay adjustments must align with integer ticks. Furthermore, modern web browsers enforce a strict 20 ms delay floor (equivalent to 50 frames per second); delays set below 20 ms are clamped by browsers to prevent CPU spikes. This tool recalculates every frame delay with browser-safe bounds and calculates your new total duration in real time.
Use Cases
How to change GIF playback speed
Choose or drag a GIF file. The tool calculates its existing duration and frame timing.
Use the slider or preset buttons (0.25×, 0.5×, 1.5×, 2×, 4×) to speed up or slow down playback.
Review the updated total animation duration displayed right beside the speed controls.
Click Run to rebuild the GIF with adjusted frame delays and save your modified animation.
Frequently Asked Questions
- Why is there a 20 ms delay limit in browsers?
- The GIF89a format allows delays in centiseconds, but web browsers clamp any delay under 20 ms (50 fps) to avoid runaway CPU consumption. Setting delays below 20 ms often causes browsers to fall back to a sluggish 100 ms.
- What does 10 ms GIF delay granularity mean?
- GIF stores frame delays as hundredths of a second (1 centisecond = 10 milliseconds). A frame delay can be 20 ms, 30 ms, or 40 ms, but cannot be 25 ms. Our tool rounds calculated delays to the nearest valid tick.
- Will speeding up a GIF change its file size?
- Changing speed only modifies the delay values in the Graphic Control Extension blocks; the image data remains identical, so file size changes negligibly.
- Can I create extreme slow motion?
- Yes, setting a 0.25× factor quadruples the display time of every frame, allowing viewers to inspect frame-by-frame action clearly.
Private by design. Frame delay recalculation and GIF packaging run entirely in your browser — your GIF is never uploaded to a server.
Related tools
More free, in-browser tools from the GIF Tools set — every one runs locally, with no sign-up and no upload.