About border.video

border.video puts a frame round a video. That sounds small, but it is something people need all the time: a white edge so a clip looks like a print, a square or vertical canvas so a social app stops cropping it, rounded corners for a slide, or a Polaroid edge with a few words underneath. Most editors can do it, eventually, after a project, a timeline and an export dialog. This site does it in the time it takes to pick a colour.

What you can do here

• Choose from eight looks (Clean white, Black, Soft rounded, Polaroid, Gradient, Blurred background, Film strip and Shadow card), each previewed on a still from your own clip.
• Change the shape to 1:1, 4:5, 9:16 or 16:9. The video is fitted inside, never cropped, and the spare space becomes border.
• Set every detail under More options: widths per side in percent or pixels, solid, gradient, blurred or film-strip backgrounds, corner radius, inner padding, a drop shadow, an outline, the video’s size and position, and a caption in the bottom border.
• Put 2 to 6 clips into one frame with Make a collage, then choose how shorter clips behave and whose sound to keep.
• Trim the start and end, keep or drop the sound, and save an MP4 or, where supported, WebM.

How it works

border.video is a static web app. When you open a clip, your browser decodes it with the WebCodecs API and the open-source mediabunny library. One small drawing routine paints the border, padding, corners, shadow and caption around each frame; the live preview, the look thumbnails and the final export all use that same routine, so the file you download matches what you saw. The export runs in background workers on your device, split into chunks where your processor has cores to spare, and the original sound is carried across. Nothing is sent to a server at any point.

Our promises

• Your videos stay on your device.
• No watermark, no account and no charge.
• No ads. Visit statistics only, and you can switch them off in Cookie settings.
• Plain answers in the guides, including how to do the same job in the apps you already have.

Who it is for

People posting to Instagram, TikTok or YouTube who want the whole frame to show; teachers and presenters dropping clips into slides; small businesses that want a consistent look on every post; and anyone with a private video they would rather not upload to a stranger’s server.

border.video is an independent, self-funded project. See Privacy for exactly what the site stores and sends.