How to edit vertical video online for Shorts, Reels and TikTok
Vertical video is not landscape footage turned sideways. A 9:16 edit that works keeps the subject readable at phone size, leaves room for the buttons the app puts on top of your picture, and earns attention before a thumb takes it away. Here is what actually makes the difference.
Set the frame before you cut anything
Start the project at 1080 × 1920 and 30 frames per second unless your footage or the platform demands otherwise. Choosing the canvas first saves you from repositioning every title, caption and overlay later, because they were placed against the wrong shape.
When landscape footage lands in a vertical frame you have two honest options, and it is worth picking on purpose. Fit the whole image and you keep every pixel but gain empty bands above and below. Crop into the action and it looks native to the feed, but you need a subject worth cropping to.
- ✓Keep faces and the thing you are pointing at near the middle.
- ✓Check nothing important sits where the app puts its own buttons.
- ✓Watch the whole thing at phone size before you export.
Fast cuts are not the point
Short-form edits do cut quickly, but speed is a side effect, not the goal — every cut should leave the viewer understanding something new. Take out the dead air first, then take out the second time you made the same point. A two-second pause that builds anticipation earns its place; a two-second pause while you hunt for the word does not.
Cut to a second angle or some B-roll when it explains what you are saying. Movement that is only there to look busy makes a short video feel slower, even when the cuts are fast.
Captions are part of the picture
Most feeds start muted, so captions are often the only thing being read. Break speech into short phrases instead of dropping a paragraph on screen, and keep them in the same place throughout — strong contrast and a consistent position beat any fancy preset.
Highlighting the current word helps the eye keep up, as long as it is not flashing faster than anyone can read. Names, numbers and technical terms are where automatic captions go wrong most often, so those are the ones worth checking by hand.
Watch it back before you post
A standard H.264 MP4 is the safest thing to hand to any of the big short-video platforms. Then watch your export from beginning to end: listen for audio that clips, check the first frame and the last frame, and confirm the captions land where you left them. The preview and the final encode take different routes to the screen, so the exported file always has the final word.