Slow MotionSlow Motion & Speed Ramp
FREERuns on your deviceRuns on your deviceTrim your clip, pick the moment and slow only that part down.Free vs Pro Same Tool, More Power.
| Feature | Free | Pro |
|---|---|---|
| Export quality | Up to 720p | 1080p and 4K |
| Slow zones per clip | 1 | Unlimited |
| Ramps on the beat | — | ✓ Synced to the music |
| Watermark | None | None |
Slow Down a Video in Three Steps.
- Add your clipDrop an MP4, MOV or WebM. It opens right in your browser, so nothing is uploaded.
- Pick the momentTrim the ends, then drag the yellow handles over the part you want slow. Choose 0.5×, 0.25× or 0.1× and a smooth or hard ramp.
- ExportPreview it, then save an MP4. Everything outside the slow zone stays at normal speed.
Frame Rate Decides How Slow You Can Go.
Slow motion is only smooth when there are enough frames to stretch. This is the single most useful thing to know before you shoot or slow anything down.
Fine at normal speed. Anything slower needs blended frames to look smooth.
Smooth at half speed. At 0.25× it drops to 15 fps.
Smooth at a quarter of the speed. The usual phone slo-mo setting.
Smooth at an eighth of the speed. Great for splashes and sport.
Video looks smooth to most people at about 24 to 30 frames per second. Multiply the frame rate you shot at by the speed you want. If the answer is under 24, the tool repeats or blends frames.
Four Speed Ramps Worth Stealing.
A speed ramp is a change of speed inside one clip. These four patterns cover most of what you see in ads, sports edits and Reels.
The Impact
1× → 0.25× → 1×Normal speed into the moment, 0.25× right at the hit, then back to normal. Keep the slow part under two seconds of real time so the energy stays.
The Reveal
1× → 0.5×Play the build-up at normal speed and let the last second slide into 0.5×, so the final look stays on screen longer.
The Pour
0.5× throughoutThe whole clip at 0.5× with soft ramps at each end. Liquids, powders and fabric look richer, and the smooth start hides the cut.
The Double Take
1× → 0.25× (hard)A short hard drop to 0.25× on the reaction, then a hard cut back. The sudden change is the joke, so the ramp should be instant.
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Image18Start Frame PrepFit a start frame to the exact size an AI video model wants.Make Slow Motion Videos Online, Free
Pick any moment in a clip and slow just that part down, with smooth speed ramps in and out. Trim the start and end in the same place, then save an MP4 for Reels, TikTok, Shorts or an ad.
Everything runs in your browser, so your video never leaves your device.
Slow Down Only the Moment That Matters
Slowing a whole clip makes it drag. A speed ramp keeps the build-up at normal speed and stretches only the hit, the pour or the reveal, which is how sports edits and product ads hold attention.
Choose a hard cut for a sudden effect or a smooth ramp that eases in and out.
Shoot Footage That Slows Down Well.
The best slow motion starts in the camera. Five habits that make every clip easier to slow down.
- 01
Turn on Slo-Mo When You Record
On iPhone, Slo-mo mode records at 120 or 240 fps. Many Android phones have a Slow motion mode at 120 or 240 fps, and some go higher. More frames now means smoother slow motion later.
- 02
Add Light
High frame rates use shorter exposures, so indoor footage gets dark and grainy. Shoot near a window, outdoors, or add a lamp.
- 03
Use a Fast Shutter If You Can Set It
A common rule is a shutter of about one over twice the frame rate, such as 1/240 s at 120 fps. It keeps motion crisp instead of smeared.
- 04
Hold Steady and Leave Room
Shake is slowed down too. Brace the phone, and start recording a second before the action and stop a second after, so you have space to ramp.
- 05
Slow the Peak, Not the Whole Clip
Viewers stay for the moment, not the wait. Trim the slow build-up and spend the slow motion on the second that matters.
Slow Motion, Answered.
Can I slow down just one part of a video?
Yes. Drag the yellow handles on the timeline over the part you want slow. Everything before and after plays at normal speed.
Why does my slow motion look choppy?
There aren’t enough frames. Multiply your clip’s frame rate by the speed: a 30 fps clip at 0.25× plays at about 8 fps. Use a clip recorded at 120 or 240 fps, a gentler speed, or Blend to mix neighbouring frames.
What is the slowest speed?
0.1×, which makes one second last ten. Below 0.25× it only looks smooth on footage shot at a high frame rate.
Is my video uploaded?
No. Trimming, slowing and exporting happen in your browser, so your video never leaves your device.
What happens to the sound?
Keep pitch slows the sound without making voices deep. Deep gives the classic slow-motion growl, and Mute removes the sound in the slow part only.
Can I speed a video up too?
Yes. Choose Custom and set any speed from 0.1× to 4×, for the whole clip or just the zone you selected.
Which files work?
MP4, MOV and WebM from phones, cameras and screen recorders. You get an MP4 that plays everywhere.
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