Video Speed
Speed up or slow down videos online for free. 0.25x slow motion to 4x fast forward. Audio pitch adjusts automatically. No signup.
Drag & drop a file here, or click to browse
MP4, MOV, WebM, MKV, AVI, M4V · up to 500 MB
How to use Video Speed
- 1. Upload your video. Drag in an MP4, MOV, WebM, MKV, AVI, or M4V file — up to 500 MB.
- 2. Pick a speed. Choose a preset (0.25x–4x) or drag the slider for precise control down to 0.05x increments.
- 3. Preview the estimate. We show the estimated output duration so you know exactly how long the result will be.
- 4. Process & download. Hit 'Change Speed' — we re-encode on the server with audio pitch correction and deliver a ready MP4.
FAQ
Does the audio change when I speed up or slow down?
Yes — audio pitch adjusts proportionally. At 2x the audio plays at double speed, at 0.5x it plays at half speed. The server re-encodes both tracks together.
What is the maximum speed?
You can go from 0.25x (¼ speed slow motion) up to 4x. The slider gives you fine-grained control in 0.05x increments.
Will slow motion look smooth?
It depends on your source frame rate. A 60fps source slowed to 0.5x will still be 30fps and look smooth. A 24fps source at 0.25x will be 6fps, which looks choppy. For best slow-mo, shoot at 60fps or higher.
Can I slow down just part of the video?
Not yet — this tool changes the speed of the entire video. Trim first with our Video Trimmer, then apply slow-mo to that clip.
Where is my file processed?
On our EU server. Files are auto-deleted within 1 hour. We don't share, analyse, or store them.
How long does processing take?
Usually a few seconds to a couple of minutes, depending on video length and resolution. Longer slow-motion outputs take proportionally longer.
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