Frame
Drag the picture to move the window. At 1× it is the full height of the video; zoom in and it can move up and down too.
Overlay
Lays the app's buttons and caption over the preview so you can see what they cover. Not part of the download.
Export
Same frame rate and sound as the original. Nothing leaves your computer.
What it does
- 1Crop or blurred fillDrag a 9:16 window over the footage, or keep the whole frame on a blurred background.
- 2Sound stays inThe audio goes back into the finished MP4, in sync.
- 3Nothing uploadedReading, cropping and encoding all happen in this tab.
Turning 16:9 into 9:16 without losing the subject
A 16:9 to 9:16 converter that runs in your browser. Convert a horizontal video to vertical for a Reels crop, a TikTok crop or a Short: drag a window over the part that matters, or sit the whole landscape frame on a blurred background.
Going from landscape to portrait throws away most of the width. The window you keep has to hold the person, and keep them clear of the parts of the screen the app covers.
Do this
- Export at 1080 by 1920, the size every vertical feed expects
- Keep faces and hands fully inside the window, with a little air above the head
- Play the clip through before you download, so nobody walks out of frame
- Use the blurred fill for screen recordings, slides and wide shots where cropping would cut off what people need to read
Avoid this
- Putting the subject in the bottom of the frame, where the caption and the sound name sit
- Anything important along the right edge, under the like, comment and share buttons
- Cropping a two-person shot down the middle so half a face shows on each side
- Zooming in so far that a 1080p source turns soft
Questions
Why 9:16?
Does it keep the sound?
Does the crop follow the person as they move?
Is my video uploaded anywhere?
Which files and browsers work?
How long does the export take?
Shorts by Slice
Need the crop to follow the speaker?
This tool keeps one window still. When the frame should move with whoever is talking, and captions need burning in, that is what Shorts does.
This tool is looked after by Trim.Fussy and exact. Will move a frame one pixel and call it a big improvement.