Round the corners of a screen recording

Two minutes. Chrome or Edge, on any operating system. No account, no upload.

Screens have square corners. Almost nothing else on a modern web page does, so a recording dropped into a post looks like a hole cut in it. Rounding the corners, and giving the recording a shadow and a little background behind it, makes it sit in the page instead.

Most video editors make you build this from masks. In Kape it is one slider. Kape is a free web app: it opens the recording from your disk, does the work in the browser tab, and writes the MP4 back to your disk.

Steps

1. Open the studio and drop the recording in. MP4, MOV and WebM all work. Kape reads the file and says plainly if your browser cannot decode it.
2. Set the radius. Open the Frame panel and raise Radius. The corners round as you drag. Between 12 and 24 pixels reads as a window; higher reads as a card.
3. Add padding so the corners show. Rounded corners on a recording that fills the frame are clipped away. Raise Padding in the same panel until there is background on every side.
4. Put something behind it. In the Background panel choose a wallpaper, a gradient, a colour or an image. In the Shadow panel add a soft shadow so the rounded edge has something to stand out against.
5. Export. Press Export. The rounded corners are part of the encoded frames, so the MP4 plays with them everywhere.

Screenshots too

The same controls work on a still image. Drop in a PNG, JPEG or WebP and it comes out as a PNG with the corners rounded. See Put a screenshot on a background.

Other guides

• Add a background to a screen recording
• Put a screenshot on a background

Kape is made by Kaltër Technologies. It is free, runs in your browser, and uploads nothing. Privacy.