How to Convert Horizontal Video to Vertical: A Step-by-Step Guide
From 16:9 to 9:16 without black bars or awkward crops. The simplest method, step by step, on phone, tablet or desktop.
Quick answer: to convert horizontal video to vertical, open the 16:9 clip in a reframing tool, set the output to 9:16, position the vertical frame over your subject, move the frame as the subject moves (with your finger or keyframes) and export at 1080 x 1920. Avoid simply adding black bars or a blurred background, which wastes most of the screen.
This is one of the most searched editing questions, and the answer depends less on the tool than on a few good decisions.
Your three options
Letterbox: place the wide video in the middle with bars or blur above and below. Fast, but the picture is tiny on a phone.
Center crop: cut the middle of the frame. Fast, but anything off-center is lost.
Reframe: move a vertical window across the wide image to follow the subject. Takes a little longer, looks native.
Step by step
1. Choose your source. Higher resolution is better. 4K gives sharp vertical crops.
2. Set the output to 9:16.
3. Place the frame on the subject at the first frame.
4. Play and guide. Move the frame as the subject moves. On a touch device, follow with your finger. On desktop, set keyframes.
5. Refine. Remove unnecessary keyframes and adjust how smooth the motion feels.
6. Check on a phone for safe zones and readability.
7. Export at 1080 x 1920 in H.264.
Common mistakes
Using a 1080p source and getting a soft crop. Following every tiny movement and creating a shaky frame. Forgetting that captions and buttons cover the bottom of the screen.
Convert by hand, in minutes
Cropper is a free download for iPhone and Android.