Free · No watermark · Nothing uploaded

Horizontal to vertical video, 16:9 to 9:16 on your device

Drop your own video, drag the crop onto the action, export a 1080x1920 file with its sound.

Made for turning a landscape clip you filmed or edited into a Short, a Reel or a TikTok. Check the platform's buttons and captions against your shot with the safe zone overlay, pan across the frame with keyframes, or keep the whole picture on a blurred fill. Your video never leaves the browser, and the export carries no watermark.

Drop or click to choose

Drag and drop, or pick a file from your device

MP4, WebM or MOV your browser can play. Up to 3 minutes and 2 GB.

Nothing uploaded No watermark Sound kept

Your video: drag the box onto the action

0:00 / 0:00

Position

Zoom

With two or more pan points the crop glides between them as the video plays. With none it stays where you put it.

9:16 result, 1080x1920

Show Shorts safe zones

The red areas sit under the app's own buttons and text. They are approximate and shift between app versions, so keep faces and captions in the clear middle.

Checking what this browser can record...

Download video

How to turn a horizontal video vertical

1. Drop your video

Pick a clip from your own device. It opens in the browser's own player, so nothing is sent anywhere.

2. Drag the crop onto the action

Move the bright box over the part of the frame that matters. Add pan points if the action moves, or switch to the blurred fill to keep the whole picture.

3. Check the safe zones

The overlay marks where the Shorts buttons, title and channel name will sit, so a face or a caption does not end up underneath them.

4. Export and download

The browser records a 1080x1920 file with the original sound. Download it, or go straight on to making its cover.

What the export is, browser by browser

The file is recorded by your browser's own media recorder from the cropped frames. Which container it can write depends on the browser, and the tool tells you before you press export:

Browser	File you get	Notes
Chrome and Edge (recent)	MP4, H.264 video and AAC sound	Uploads to YouTube, Instagram and TikTok as it is.
Safari on Mac, iPhone and iPad	MP4, H.264 video and AAC sound	Keep the tab open and the screen on while it records.
Firefox, and older Chrome	WebM, VP8 or VP9 video and Opus sound	YouTube accepts WebM. For apps that want MP4, open it in a converter or record it again in Chrome or Safari.

Limits, in numbers

Up to 3 minutes per clip, the longest a YouTube Short can be. Trim longer videos first.
Up to 2 GB per file. The file is read from your disk as it plays, not loaded into memory, so size matters less than length.
The export runs in real time. A 60 second clip takes about 60 seconds, because the browser records the frames as they play. Keep the tab in front: a hidden tab stops drawing frames.
Output is always 1080x1920 at up to 30 frames a second, about 8 megabits a second. On an older phone the recorder can drop frames on busy footage; a laptop is the safer place for a long clip.

Crop to fill, or the whole frame on a blur?

Cropping a 16:9 frame to 9:16 keeps about a third of its width. That is right for a talking head, a single player or anything with one clear subject, and the pan points let the window follow it. When the whole width matters, a slide, a gameplay HUD or two people side by side, the blurred fill keeps the full frame in the middle and fills the top and bottom with a soft, darkened copy of the same shot.

Questions, answered

Is my video uploaded anywhere?

No. The file opens in your browser's own video player, each frame is drawn onto a canvas on your device, and the browser records the result. The counter under the upload box shows how many bytes of request body left the page while you worked, and you can check it against the Network tab in your browser's developer tools.

Is there a watermark?

No. The file you download is exactly the frames you framed, with nothing stamped on them, and there is no account or sign-up.

Does it keep the sound?

Yes. The original audio is recorded into the new file alongside the video. The export plays silently while it records, so you will not hear the clip twice.

Why is the export as long as the video?

The browser's media recorder captures frames as the video plays, at normal speed. That is what lets it run on any modern browser with no download and no server, and it is why a 45 second clip takes about 45 seconds.

Can I paste a YouTube or Twitch link?

No, and on purpose. This tool works on video files you already have on your device, such as your own recordings and edits. It does not download anyone's videos from a platform.

What are the safe zones based on?

The red areas mark roughly where the Shorts player draws its top bar, the like, comment and share buttons on the right, and the title, channel name and sound line along the bottom. They are approximate and the app moves things between versions, so treat them as a margin to stay clear of rather than an exact line.

Why did I get a WebM file instead of an MP4?

Your browser's recorder can only write WebM. Chrome, Edge and Safari in their current versions write MP4; Firefox writes WebM. YouTube takes WebM uploads directly. The tool names the format before you export, so it is never a surprise.