How to Use Speed Ramp
- Upload the clip you want to ramp (MP4, MOV, MKV or WebM)
- Pick a preset, or drag the points on the curve: up is faster, down is slower
- Press Play preview to watch the ramp and check the new length
- Choose what happens to the sound, click Process and download the video
Features
- Speed curve editor: drag points from 0.25x to 4x over your clip's own timeline, add or remove points with a tap
- Six velocity edit presets: Hero Time, Montage, Bullet, Flash In, Flash Out and Smooth Ramp
- Live preview plays your clip along the curve before anything is rendered
- Shows the new length while you edit, and the rendered video matches it
- Mute the clip for music, or keep its sound sped up and slowed down with the picture at the same pitch
- Slow parts repeat frames (sharp) or blend neighbouring frames (smoother)
- Free in your browser with no sign-up and no watermark; MP4, MOV and MKV output
Quick Facts
- Every point on the curve can be set from 0.25x (four times slower) to 4x (four times faster), and the speed eases smoothly between points.
- Hero Time plays the first and last 30% of a clip at 2.5x and slows the middle (42% to 58% of its length) to 0.3x, so a 10-second clip comes out 11.3 seconds long.
- A 30 fps clip slowed to 0.25x has 7.5 new frames per second, so each one is shown four times unless neighbouring frames are blended.
Which Tool Do I Need?
Use Speed Ramp when the speed should change within one clip. For a single speed across the whole video, use Change Video Speed; for slow motion with newly generated in-between frames, use AI Slow Motion.
Frequently Asked Questions
- What is a velocity edit?
- A velocity edit is a short clip whose speed changes in rhythm: fast through the build-up, slow motion on the key moment, then fast again, usually cut to music. A speed curve sets the speed at every moment of the clip, which is how those ramps are made.
- How do I make a speed ramp online?
- Upload a video, pick a preset or drag the curve's points onto the moment you want slowed, press Play preview to check it, then click Process. The ramp can render right in your browser, so a short clip takes seconds and never has to upload.
- Is this like the speed curve in CapCut?
- It is the same idea: a curve of speed over the clip, with presets for the common shapes such as Hero Time, Montage, Bullet, Flash In and Flash Out. It runs in a web browser on any phone or computer, with no app to install and no watermark.
- Can I keep the original sound?
- Yes. Pick Keep under Audio and the sound speeds up and slows down with the picture while its pitch stays the same. Most velocity edits are set to music instead, so the default mutes the clip and you add the song afterwards with Add Audio to Video.
- Why does the slow-motion part look choppy?
- A 30 fps clip slowed to 0.25x has only 7.5 real frames per second, so each frame shows four times. Pick Smooth under Slow-motion frames to blend neighbouring frames, film the moment at 60 fps or higher, or use AI Slow Motion, which generates new in-between frames.
- How long will my video be after the ramp?
- The editor shows the new length while you drag, and the rendered video matches it. Slow parts make a clip longer and fast parts make it shorter: Hero Time turns a 10-second clip into 11.3 seconds, Bullet into 6.4 seconds.
- How do I put the slow motion on the right moment?
- Drag the slow points sideways until they sit over the moment in the filmstrip under the curve, then press Play preview. Tap the curve to add a point and tap a point to select or remove it; the first and last points always stay at the start and end of the clip.