---
title: "Speed up or slow a video free · Cutshed"
description: "Speed a video up or slow it down in the browser, and keep the picture and audio in sync. Download the result. The file stays on this device."
canonical: "https://cutshed.com/video-speed/"
---

# Speed up or slow a video free · Cutshed

Speed a video up or slow it down in the browser, and keep the picture and audio in sync. Download the result. The file stays on this device.

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- Background remover
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- / Speed up or slow a video free
Video · 14
# Speed up or slow a video free
Cutshed Video speed is a free browser tool that runs on this device. Change video playback speed and keep the audio in sync.
0.5×, 0.75×, 1.5×, or 2×. The picture uses setpts. The audio uses atempo. Pitch follows the speed, the way a timeline speed change usually does.
## How to use it
- This is not a pitch-locked slow motion. At 2× the voice is higher and shorter. At 0.5× it is lower and longer. If you need the voice to stay in key, change the audio on the pitch and speed page and edit the picture separately.
- The export is a new H.264 and AAC file. A 4 second clip at 2× comes back near 2 seconds. Duration scales with the speed you picked.
- Very slow motion of a 24 fps clip looks stepped because there are no new frames, only repeated time. This page does not invent in-between frames.
## Tips
- 2× is the useful speed for a screen recording that drags.
- 0.5× on a short action beat is enough. Slowing a whole minute is a long encode for a hard-to-watch result.
- Mute first if the sped-up audio is the part you do not want.
## FAQ
- Will the audio stay lined up?
Yes. Both streams are retimed by the same factor and written together.
- Can I pick 1.1×?
Not here. The speeds are the ones that stay inside a single atempo stage and are easy to judge by ear.
- Is the clip uploaded?
No. ffmpeg.wasm does the retiming locally.
## License
Encoding uses the single-thread ffmpeg.wasm build shipped with Cutshed. The JavaScript wrapper (@ffmpeg/ffmpeg and @ffmpeg/util) is MIT. The core binary is GPL-2.0-or-later because the build enables GPL components, including libx264, libmp3lame, libvorbis, and native AAC and FLAC. That license covers the encoder, not your recording.
## Related tools
- Video Video editor Cut, title, and export a timeline in the browser.
- Video Video compressor Squeeze a clip toward a size limit.
- Video Video trimmer Keep the part of a clip you actually need.
Files stay on this device.
Free tools never upload the file you open. Studio is the only paid part of the site, and the only place a prompt is sent to a video model.

## Links

- [C Cutshed](/)
- [Studio](/studio/)
- [Video Game Clipper](/video-game-clipper/)
- [Stream Clipper](/stream-clipper/)
- [Week of Shorts](/stream-to-shorts/)
- [Editor](/editor/)
- [Free tools](/#tool-grid)
- [Vocal remover](/vocal-remover/)
- [Audio trimmer](/audio-trimmer/)
- [Ringtone maker](/ringtone-maker/)
- [Audio converter](/audio-converter/)
- [Volume booster](/volume/)
- [Noise remover](/noise-remover/)
- [BPM and key](/bpm-key/)
- [Pitch and speed](/pitch-speed/)
- [Clip sound effects](/clip-sound-effects/)
- [AI audio maker](/ai-audio/)
- [Video compressor](/video-compressor/)
- [Video trimmer](/video-trimmer/)
- [Crop and resize](/video-crop/)
- [Frames and thumbnails](/video-frames/)
- [Mute video](/mute-video/)
- [Video speed](/video-speed/)
- [Merge clips](/merge-clips/)
- [Video to MP3](/video-to-mp3/)
- [Video to GIF](/video-to-gif/)
- [Video splitter](/video-splitter/)
- [Background remover](/background-remover/)
- [Image upscaler](/image-upscaler/)
- [Image converter](/image-converter/)
- [Thumbnail maker](/thumbnail-maker/)
- [AI emoji maker](/ai-emoji-maker/)
- [Subtitle generator](/subtitles/)
- [Subtitle translator](/subtitle-translator/)
- [Timing shifter](/subtitle-shifter/)
- [Transcript to post](/transcript/)
- [Blog](/blog/)
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