Free Online Speed Ramp Video Editor

Speed ramping changes playback speed within a single video clip. An action highlight might run fast during the approach, slow down for a jump, and speed up again afterward. It is also called time remapping or a velocity edit. Changing the speed of the entire clip to one fixed value is a different effect: a speed ramp combines multiple speeds and transitions between them.

Use Fuzz Puppy's free online speed ramp editor to make a velocity edit without installing software or uploading your video:

1. Choose your video or try the demo clip, then drag the trim handles to select up to 60 seconds.
2. Pick Action highlight, Slow start, Slow finish, or Fast burst. Drag the timeline boundaries to adjust when the speed changes.
3. Use the Slow section and Fast section buttons to add patches. Open a section's menu to change its speed or remove it, and open a transition's menu to choose its curve or sound.
4. Press Play to review your edited video, drag the triangle playhead to seek, and choose Export video after reviewing the sound and export settings.

Tip: Start with Action highlight for a fast–slow–fast edit, and keep the most important action inside the slow section.

Yes. Fuzz Puppy lets you combine Slow, Fast, and Normal sections in one clip, with speeds from 0.1× to 10×. Add a slow or fast section around the playhead, then drag its shared boundaries to change its length. Removing a speed section fills its time from the neighboring sections; it does not cut footage from your video. Undo restores an edit if you change your mind.

Choose one moment to emphasize, such as a jump, turn, or reveal. Try 2× speed before it, 0.5× during the action, and 2× afterward. Use Smooth transitions for a gradual change, and place the change near a musical beat if you add music. Keep the slow patch long enough to show the full action, then preview the edit before exporting. Fuzz Puppy preserves the source aspect ratio, so a portrait clip stays portrait.

In Adobe Premiere Pro, variable speed within one clip is controlled with Time Remapping:

1. Put the clip in a sequence, then right-click it and choose Show Clip Keyframes → Time Remapping → Speed.
2. Ctrl-click on Windows or Command-click on macOS on the speed line to add keyframes around the action.
3. Raise the line between keyframes to accelerate that section, or lower it for slow motion.
4. Select a keyframe and adjust its Bezier handles to soften the transition, then preview the timing.

Tip: Leave room in the sequence for the clip's duration to change. Adobe recommends proxies or lower-resolution previews if time-remapped playback struggles.

For a quick speed ramp, Fuzz Puppy makes this easier: choose a preset and drag labelled Slow/Fast boundaries in your browser, with no keyframe-panel setup or software installation. Try Fuzz Puppy Speed Ramp.

Adobe's Time Remapping instructions

CapCut's desktop speed ramps use its Curve controls:

1. Import your footage, place it on the timeline, and select the clip.
2. Open Speed → Curve. Choose a preset, or open Customized/Custom to shape the speed curve yourself.
3. Move curve points upward for faster playback or downward for slower playback, and adjust their horizontal positions to change the timing.
4. Preview the changes, try Smooth slow-mo for a slowed section when available, and export the result.

Tip: Keep the key action inside the slower part of the curve, and check the transition timing before adding other effects.

Fuzz Puppy is easier for a quick browser-based speed ramp: its timeline labels each section Slow or Fast, lets you drag shared boundaries, and keeps transition sounds in the same place you edit the transition. Try Fuzz Puppy Speed Ramp.

CapCut's velocity-editing guide

In the CapCut mobile app, create a project, add the video, and select its timeline clip. Tap Speed → Curve, then choose a preset or Custom. Adjust the curve to alternate faster and slower motion, preview the action, and export. Normal changes the whole clip's speed; Curve is the control to use for speed changes within the clip.

Tip: For an action highlight, try faster pacing around the key moment and slower pacing during it. Check that the moment still fits your intended output length.

For a simple edit without installing CapCut, Fuzz Puppy offers a browser alternative with touch-friendly section menus and draggable boundaries. Available video formats and export settings depend on your mobile browser. Try Fuzz Puppy Speed Ramp.

CapCut's mobile speed controls · CapCut's custom velocity workflow

A slowed clip needs enough source frames for the chosen export frame rate. For example, 30 fps footage at 0.5× supplies only 15 different frames per output second. Simply exporting that at 60 fps does not create new motion detail. Start with footage recorded at a higher frame rate, slow it less, or use Frame Interpolation to generate intermediate frames. On desktop, Fuzz Puppy's inline Increase FPS control adds frames across the trimmed clip and updates the same viewer while keeping your speed sections and original scene audio.

Tip: Review the moving subject and its edges before exporting. Choose 2× or 4× when the result stays within 120 fps; unavailable options are hidden. Frame interpolation is hidden on mobile.

Frame Interpolation tool and FAQ

A speed ramp sets how fast different parts of a clip play. Optical Flow is a frame-interpolation method: it estimates motion to generate frames between existing ones. Adobe lists it under the Time Interpolation choices in the clip's Speed/Duration dialog, alongside Frame Sampling and Frame Blending. In Fuzz Puppy, use the inline Increase FPS control on desktop when you need more frames, and shape the slow and fast sections on the same timeline.

Adobe's interpolation methods guide

For a 30 fps export, 60 fps source footage supports half-speed playback at 0.5×, and 120 fps source footage supports quarter-speed playback at 0.25×, without needing repeated frames. Fuzz Puppy defaults exports to your source frame rate; you can choose a different rate in Export settings, including 120 or 240 fps when your browser can encode it. Choose the output rate for your intended delivery, and use the source frame rate and slowdown together to judge whether interpolation is needed.

Yes. Keep scene audio · natural pitch is the default in Fuzz Puppy's Sound & music settings. Pitch-preserving time stretching keeps scene sound synchronized with your speed changes while keeping voices at their original pitch. You can instead let pitch follow speed or mute the scene audio. Added music and transition sound effects play at normal speed. Preview extreme slowdowns or speedups, because time stretching can affect how clear speech sounds.

Yes. Fuzz Puppy's speed ramp editor is free to use, requires no account, and adds no watermark. Editing and export run in your browser, and your selected video is not uploaded for processing. Download your finished video before closing the tab; the speed-ramp project is kept in memory for the current session.

Open an MP4, MOV, or WebM video that your browser can decode, and trim it to a selection of up to 60 seconds. Export MP4 or WebM depending on the browser's encoding support, with resolution choices up to 1080p. Aspect ratio is preserved. If a codec is unsupported, use the offered preparation controls to make a compatible copy. For a longer recording, select the highlight you want to ramp or trim it first with Fuzz Puppy's Video Trimmer.

Video Trimmer