Speed up or slow down your videos.
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A video speed changer alters how fast or slow a video plays back, without changing anything else about the content. Speeding a video up compresses its playback time; slowing it down stretches it into a longer, smoother-looking sequence.
Pick a speed multiplier from 0.5x (half speed, useful for slow motion) up to 4x (quadruple speed, useful for fast-forward-style timelapses), and the tool adjusts both the video timing and the audio pitch-correction together, so sped-up speech doesn't sound like a chipmunk and slowed-down speech doesn't sound like a demonic drawl.
Internally, this uses FFmpeg's setpts filter to retime video frames and the atempo filter to retime audio while preserving pitch, which is the same approach used by professional editing software for basic speed ramps.
Common uses include speeding up a long tutorial or meeting recording to review it faster, creating a slow-motion effect from a normal-speed clip for dramatic effect, condensing a long process (like a cooking or build video) into a satisfying fast-forward, or adjusting a video's pace to match background music.
For extreme slow motion (below 0.5x) or extreme speed-up (above 4x), consider running the tool twice in sequence for a smoother result, since very large single-step speed changes can occasionally affect audio clarity.
Speed changes interact differently with different types of content: a fast-forwarded cooking or building process can look satisfying and easy to follow even at 4x, while dialogue-heavy footage sped up beyond around 1.5x-2x often becomes hard to understand even with pitch correction applied.
For dramatic slow-motion effects, footage originally shot at a high frame rate (60fps or higher) will look noticeably smoother when slowed down than footage shot at a standard 24-30fps, since there's simply more captured frame data to stretch across the slower timeline.
If your goal is simply to review long-form content more quickly — like a recorded lecture or meeting — the 1.5x or 2x presets typically keep speech intelligible while noticeably cutting down your watch time, making this a practical tool for studying or catching up on recordings without dedicating as much time to playback.
Because this tool processes the entire file at the chosen speed, if you only want part of a video sped up and the rest left at normal speed, trim out just that section first with our Video Trimmer, apply the speed change to that piece alone, and merge it back with the untouched sections using our Video Merger.
Fast-paced highlight reels, workout videos, and process/build videos in particular tend to benefit the most from speed adjustments, turning otherwise repetitive footage into something snappier and more watchable.
In short, adjusting pace is one of the simplest but most effective edits you can make to keep viewers engaged from start to finish.
Try a few different multipliers to see which pace best fits your particular footage and audience.
Whichever direction you go, pitch-corrected audio keeps the result sounding natural throughout.
No, we use pitch-correcting audio processing so that speeding up or slowing down doesn't make voices sound unnaturally high or low.
The available presets go down to 0.5x for the best audio quality; very extreme slow-downs can be achieved by applying the 0.5x preset twice.
No, only the timing of frames and audio changes — the visual quality of each frame is unaffected.
Yes, use our Audio Remover tool first, then apply the speed change to the silent video.