---
title: "Merge videos online, free, no upload | Kuro"
description: "Join two to twenty clips into one MP4, in the order you set. Clips of another shape are fitted with black bars, never stretched. Free, in your browser."
canonical_url: "https://meetkuro.com/tools/merge-videos/"
locale: "en"
tool: "merge-videos"
---

# Merge videos

Drop your clips, put them in order and get one MP4. A clip of another shape keeps its own, with black bars, and nothing leaves your device.

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

[Merge videos](https://meetkuro.com/tools/merge-videos/)

## How it works

1. Drop two or more videos, or add them a few at a time.
2. Put them in the order they should play. The first one sets the shape.
3. Merge, then download the MP4.

## Questions

### What size is the merged video?

The first clip's shape and size, brought down to 1920 pixels on its long side if it's bigger. Move another clip to the top to use its shape instead.

### What happens to clips of a different shape?

They're scaled to fit inside the picture whole and centred, with black bars at the sides or above and below. Nothing is stretched or cropped.

### Can I merge clips from different phones or apps?

Yes. Every clip is re-encoded to H.264 at the first clip's frame rate, and its sound to AAC at 48 kHz stereo, so sizes, frame rates and formats can differ. A clip with no sound plays silence for its length. A clip this browser can't play is left out, and the tool says which one and why.

### Is there a limit?

Up to 20 clips of up to 2 GB each, and 15 minutes in total, because the picture is re-encoded and the result is held in memory.

### Does anything get uploaded?

No. The clips are joined in your browser, on your device.

## Kuro

In Kuro you make the clips themselves from a few words or a picture, and can start each one on the last frame of the one before, so they join without a jump.

[Make the next clip in Kuro](https://app.meetkuro.com/create?type=shorts&utm_source=tools&utm_medium=tool&utm_campaign=merge-videos) — 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/