# Magnify part of a video with a zoom lens

> Drag a box around a detail and a round lens enlarges it, on top of the full picture. If the detail moves, the lens follows it.

Put a magnifying lens over a detail in your video and keep it there while the detail moves. For product close-ups, replays and tutorials. Free, in your browser.

- Page: https://cutluma.com/tools/magnify-video
- Open in the editor: https://cutluma.com/editor?guest=1&tool=tracking&mark=lens
- Access: Free, no credit card, runs in the browser
- Maker: CutLuma (https://cutluma.com/)

## How it works

1. **Drop in your video** — A product demo, a replay, a screen recording, a how-to.
2. **Drag a box around the detail** — The lens appears over it. Set how much it enlarges, from 1.2× to 5×.
3. **Let it follow** — Choose “a moving thing” and the lens rides along. Export when it looks right.

## Why CutLuma for this

- **The whole picture stays** — Viewers see the close-up and where it is at the same time. No cut to a second shot.
- **Round or square** — Change the shape, the rim colour and its thickness.
- **Pairs with labels** — Add a name tag or an arrow that follows the same detail.

## FAQ

**Is it free?**

Yes, it is part of the free editor and runs in your browser.

**Does the close-up get blurry?**

The lens enlarges the pixels of your video, so a 1080p or 4K source stays sharper at high zoom than a small one.

**Can I zoom the whole frame instead?**

Yes. Smooth zooms on the whole picture are under Magic tools; the lens is for showing a detail without losing the wide view.