---
title: "Change video speed online, free, no upload | Kuro"
description: "Speed a video up to 4× or slow it to 0.25×, with the sound kept at its own pitch. Free, in your browser, and the file never leaves your device."
canonical_url: "https://meetkuro.com/tools/change-video-speed/"
locale: "en"
tool: "change-video-speed"
---

# Change video speed

Pick a speed from 0.25× to 4× and get an MP4 that plays that fast. The sound keeps its pitch, so a voice at 2× sounds quicker, not higher.

Your file never leaves this device. Everything runs in your browser.

[Change video speed](https://meetkuro.com/tools/change-video-speed/)

## Made for

- [Slow motion](https://meetkuro.com/tools/change-video-speed/slow-motion/)

## How it works

1. Drop your video.
2. Pick a speed and play the preview at it. Keep the sound or leave it out.
3. Change the speed, then download the MP4.

## Questions

### What happens to the sound?

It's stretched or squeezed to the new length and keeps its pitch, by SoundTouch, an open-source time-stretcher that runs in your browser. Untick Keep the sound to leave it out instead.

### Is slow motion smooth?

As smooth as the frames you filmed. Slowing down uses every frame the camera recorded, and the tool never invents frames in between. A 60 fps clip at 0.5× plays every frame at 30 fps; a 30 fps clip at 0.5× shows each frame twice. Film at 60 or 120 fps if you want slow motion to stay smooth.

### What frame rate is the result?

Sped up, the same as the original, with frames left out: a 30 fps clip at 2× keeps every other frame. Slowed down, every recorded frame at its new pace, and never below 30 fps if the original had 30 or more. Never above 60 fps.

### What format do I get?

An MP4 with H.264 video and AAC sound, whatever you dropped. The picture is re-encoded, so it works on videos up to 15 minutes long, before and after the change.

### Does my video get uploaded?

No. It's decoded, retimed and encoded in your browser, on your device.

## Kuro

In Kuro you make the next clip from a few words or a picture, vertical and ready to post.

[Make your next clip in Kuro](https://app.meetkuro.com/create?type=shorts&utm_source=tools&utm_medium=tool&utm_campaign=change-video-speed) — Kuro opens the clip composer.

## More free tools

- [Compress a video](https://meetkuro.com/tools/compress-video.md): Make a video small enough for Discord, email or WhatsApp.
- [Resize a video](https://meetkuro.com/tools/resize-video.md): Turn a video into 9:16 for TikTok, Reels and Shorts, or 4:5, 1:1 or 16:9.
- [Crop a video](https://meetkuro.com/tools/crop-video.md): Cut a video down to the part you want to keep, at its own size.
- [Rotate a video](https://meetkuro.com/tools/rotate-video.md): Turn a video the right way up, or mirror it.
- [Safe-zone checker](https://meetkuro.com/tools/safe-zone-checker.md): See where TikTok, Reels and Shorts will cover your video before you post.
- [Trim a video](https://meetkuro.com/tools/trim-video.md): Cut a video down to the part you want, in seconds.

---

## About Kuro

Kuro is an AI picture studio: prompt-driven images, clips, voice-overs and music, and storyboard-backed films with consistent characters across every scene.

Agents connect over MCP and can generate directly:

```
claude mcp add kuro https://api.meetkuro.com/mcp --transport http
```

The app is at https://app.meetkuro.com and requires an account.

Each guide, model page, comparison and free tool page on this site (not a tool's variants, and not the index pages) has a Markdown twin at its own URL plus `.md`, and so do /benchmarks/, the English /agents/ page (as /agents.md) and the MCP tool reference. Free video tools: https://meetkuro.com/tools/