# Change the Speed of a Video

Make a time-lapse of a long recording, slow down a moment, or play a tutorial at 1.5×. The picture is usually copied without re-encoding, and the sound keeps its natural pitch (or not, if you prefer the effect).

_Source: https://sharelargefilesfree.com/tools/change-video-speed · Updated 2026-09-29_

## How to use it

1. Choose or drop a video.
2. Pick a speed from 0.25× to 4×.
3. Choose what happens to the sound: keep the pitch, let it follow the speed, or remove it.
4. Press Change speed, watch the result, then download or send it.

## How it works

The compressed frames are copied with new timestamps, so the picture is not re-encoded: a 30 fps clip at 2× becomes 60 fps, at 0.5× 15 fps. Only when the result would go above 60 fps (for example 4× of a 30 fps clip) is the video re-encoded and frames skipped to a smooth 30 or 60 fps.

Slow motion shows each frame longer; the tool does not invent in-between frames. For silky slow motion, start from a video recorded at 60, 120 or 240 fps.

## The sound

- **Keep the pitch**: time-stretched with WSOLA, voices sound natural. Best between 0.5× and 2×; at extremes it can sound slightly echoey.
- **Pitch follows the speed**: like a tape played faster or slower (chipmunk or deep voice), with no stretching artefacts.
- **Remove the sound**: for time-lapses where the sound is just noise.

## Private and free

The video is processed on your device and never uploaded, with no watermark. For audio files, use [Change audio speed](https://sharelargefilesfree.com/tools/change-audio-speed); to cut the part you want first, use [Trim video](https://sharelargefilesfree.com/tools/trim-video).

## Frequently asked questions

### Does changing the speed reduce quality?

Usually not: up to 60 fps in the result the frames are copied unchanged. Above that the video is re-encoded at a high bitrate.

### Can I speed up a video without the chipmunk voice?

Yes, that is the default: “Keep the pitch” time-stretches the sound.

### How slow can I go?

Down to 0.25×, four times slower. Smooth slow motion needs a video recorded at a high frame rate.

### Is my video uploaded?

No. It is processed in your browser.