Change Video Speed
Speed up or slow down a video and its audio.
Speed range is 0.5× (slower) to 2× (faster).
Add video
MP4, MOV, WebM, MKV, AVI — up to 2 GB per file.
Choose an output
Speed up or slow down a video and its audio.
Fine-tune
Optional — sensible defaults are already set.
About Change Video Speed
Change Video Speed plays a video faster or slower, anywhere from 0.5x to 2x, and adjusts the audio to match without turning voices into chipmunks or growls. The re-timed clip is saved as an H.264 MP4.
When it helps
- Speeding up a long tutorial or screen recording so viewers get through it faster.
- Slowing a sports move or a dance step to half speed to study it.
- Making a quick time-lapse-style version of a cooking or crafting video at 2x.
- Tightening a talking-head clip slightly, for example to 1.1x or 1.2x, to fit a time limit.
Tips
- The audio is time-stretched with its pitch kept, so speech stays understandable at 1.5x and natural-sounding at small changes.
- Slowing down does not create new frames. At 0.5x a 30 fps video plays back as if it were shot at 15 fps, which can look choppy on fast motion.
- The output length changes by the speed factor: a 60-second clip becomes 30 seconds at 2x and 120 seconds at 0.5x.
Good to know
Quick answers about change video speed in your browser.
Smooth slow motion needs footage recorded at a high frame rate, such as 120 or 240 fps on a phone. This tool slows playback but does not generate in-between frames.
Yes. The audio is sped up or slowed down by the same factor so it stays in sync, while its pitch is preserved.
Yes. There is no sign-up, no watermark and no limit on how many files you process.
No. Files are read and processed locally in your browser, so they never leave your device.
Large files are slow in WebAssembly and must stay under 2GB.
Related tools
Part of the Video Editor collection.