⏩Change Video Speed
Slow-mo or hyperlapse, 0.5x–2x. Free, private, no signup — files never leave your browser.
Slow-mo drama or timelapse snap.
0.5x to 2x with pitch-correct audio — rendered locally, no upload.
5
speeds
0.5x → 2x
Synced
audio
pitch-corrected
0
uploads
in-browser FFmpeg
Free
forever
no signup
How to use Change Video Speed
Dramatic slow-mo or snappy timelapse in one tap. Pick 0.5x to 2x and get a smooth re-encoded MP4 with pitch-correct audio. Processed locally with real FFmpeg.
- 1Drop a video file (MP4, WebM, MOV).
- 2Pick a speed: 0.5x, 0.75x, 1.25x, 1.5x or 2x.
- 3Hit render and download the MP4.
Use cases
Dramatic slow-mo
Stretch sports and action moments at 0.5x.
Timelapse energy
Compress boring stretches at 2x for snappy edits.
Tutorial pacing
Slow tricky steps, speed through the obvious parts.
What change video speed does
- ✓Five speeds: 0.5x, 0.75x, 1.25x, 1.5x, 2x.
- ✓Audio stays synced with pitch correction.
- ✓Smooth frame timing via setpts/atempo chains.
- ✓Standard MP4 output.
- ✓Private: no uploads, no accounts, no watermarks.
Specs
- Speed
- Minutes for long videos, on-device
- Input
- MP4, WebM, MOV
- Output
- Speed-changed MP4
- Privacy
- In-browser FFmpeg, zero uploads
- Cost
- Free, unlimited, no signup
Frequently asked questions
Is my video uploaded anywhere?
No. Speed changes render 100% in your browser with FFmpeg. Your file never leaves your device.
Does the audio stay in sync?
Yes — audio pitch and timing are corrected automatically at every speed.
Which speeds are available?
0.5x and 0.75x slow motion, plus 1.25x, 1.5x and 2x fast forward.
What format is the download?
A standard MP4 that plays everywhere.