Browser edition: files stay on your device. Up to 100 MB total and 10 minutes. First use downloads a 32 MB engine. Some formats depend on codec support. Public-link downloading is not ready on this free deployment.
Change video speed
Speed up or slow down video and audio from 0.25× to 4×. Voices keep their natural pitch.
How to change video speed
- Add your fileDrop it on the page, choose it from your device, or paste it with Ctrl+V.
- Change speedAdjust settings if you like, then press the button. You'll see live progress.
- Browser processing uses original files on your device. Public-link downloading is unavailable.
Options explained
- Speed — 0.25×, 0.5×, 0.75×, 1.25×, 1.5×, 2×, 4×
- Audio — Keep (pitch-corrected), Remove
FAQ
Is it free?
Convert and edit files on your device. The browser edition accepts up to 100 MB total, media up to 10 minutes and video up to 4K. Codec availability and device memory can limit individual jobs.
Are my files safe?
Convert and edit files on your device. The browser edition accepts up to 100 MB total, media up to 10 minutes and video up to 4K. Codec availability and device memory can limit individual jobs.
Related tools
Trim video
Cut the start and end off a video with frame-accurate precision, or instantly with no re-encoding.
Audio cutter
Cut MP3, WAV, M4A and other audio files to the exact second, with optional fade in and fade out.
Ringtone maker
Pick the best 30 seconds of any song or video and save it as an iPhone ringtone (M4R) or an Android ringtone (MP3).
Merge videos
Join several clips into a single MP4. Different sizes and orientations are fitted automatically, without stretching.
Audio joiner
Combine MP3, WAV, M4A and other audio files into one track, in the order you choose.
Video to GIF
Turn any part of a video into a smooth, colorful GIF. Pick the moment, the size and the frame rate.