Aspect Resizer
VideoReframe video to 16:9, 9:16, 1:1 and more, filling the edges with a blurred or solid background — for every platform.
YouTube Shorts 9:16 — Reframes footage to vertical 9:16.
Aspect Resizer reframes a video for a platform that wants a different shape — landscape footage into a 9:16 Reel, or a vertical clip into a 16:9 frame. Rather than crop your subject out, it fills the gap with a blurred, darkened copy of the footage, a solid colour of your choosing, or a straight centre-crop, and shows you a live preview of the result before you commit. The re-encode happens locally.
Why use Aspect Resizer
100% private
Your video files are processed locally and never uploaded.
Instant
No upload or download wait — it runs at the speed of your device.
Free to start
Use it free every day; go Pro for unlimited runs.
No install
Works in any modern browser. No sign-up to begin.
How to use Aspect Resizer
- 1Add the footage
Drop in a landscape clip you need vertical, or any video in the wrong shape for where it's going.
- 2Choose the target shape
9:16 for Shorts and Reels, 1:1 for feeds, 16:9 for YouTube — the frame is refitted rather than squashed.
- 3Fill the edges and export
Fill the gaps with a blurred copy of the footage or a solid colour, then download the reframed clip.
Frequently asked questions
How do I turn a landscape video into portrait?
Pick 9:16 and the landscape frame is fitted inside a vertical canvas rather than cropped down to a sliver or stretched. The empty top and bottom are filled — with a blurred copy of the footage or a colour you choose — which is the look most Shorts and Reels use.
Can I remove the black bars from a video?
Yes. Choose the ratio you actually want and fill the edges with a blurred version of the frame instead of flat black, so the letterboxing stops reading as a mistake and the video fills the screen on a phone.
Does it stretch or squash the picture?
Never. The original frame keeps its proportions and is placed inside the new shape; only the background behind it changes. Stretching to fit is what makes faces look wrong, so it isn't offered.
Which ratio should I use?
9:16 for TikTok, Reels and YouTube Shorts, 1:1 for a square feed post, and 16:9 for YouTube proper. If you're repurposing one recording across all three, export it three times from the same original rather than re-converting a converted file.