YouTube Shorts maker and editor, online
Turn a moment from your long video into a vertical Short, or polish one you filmed on your phone. Reframe to 9:16, add captions and text, and export.
Made for YouTube Shorts
Shorts are vertical: 9:16, or 1080 × 1920 pixels. If your footage is landscape, the resize tool turns it vertical in one step. Fill the frame and drag to keep the speaker in shot, or fit the whole picture on a coloured background. Vertical fills the entire phone screen, which is what the Shorts feed is built around.
The Shorts player lays the title, channel name and buttons over the lower part of the video and down the right side. Keep captions and key text roughly in the middle, clear of the bottom fifth and the right edge, so nothing important ends up underneath them.
Already have a long video? On a paid plan, the AI shorts tool reads the transcript, picks moments that stand on their own and turns each one into a vertical clip with captions and a headline. Cutting a Short by hand is free.
Three steps, a few minutes
Drop in a clip
Something you filmed vertically, or a section of a landscape video.
Reframe to 9:16
Pick vertical, then drag the video until the subject sits in the middle of the frame.
Add text and export
Captions, a hook line and music, then download a vertical MP4 and upload it from YouTube Studio or the YouTube app.
Why CutLuma works for YouTube Shorts
Landscape to vertical in one click
Fill the frame and drag to reframe, or fit the whole shot on a colour or gradient background.
Captions that fit the frame
Word-by-word highlight styles in 17 languages, with lines that re-wrap for the vertical format. AI captions are on the paid plans.
Long video to Shorts with AI
On a paid plan, get up to ten suggested clips from one long video, each cut to 9:16 with captions and a headline.
A hook in the first second
Animated text presets — pop, slide, typewriter — make your opening line land straight away.
Hit the length you want
Speed a clip up, or type a duration and “fit into length” works out the speed for you.
Vertical templates
Top 5 ranking, This or that and Search bar hook are ready to fill with your own words and clips.
Tools that help
Questions? Answers.
What size is a YouTube Short?
Vertical 9:16, 1080 × 1920 pixels. Pick the 9:16 preset and the canvas is set for you.
Can I turn part of a long YouTube video into a Short?
Yes. Drop in the long video, trim to the section you want and switch the format to 9:16. On a paid plan, AI can suggest the best sections for you.
Is the Shorts maker free?
Editing and exporting are free; free exports are 720p with a small watermark. Paid plans remove the watermark, export 1080p or higher, and include AI captions and AI shorts.
Can I post to YouTube from here?
You export an MP4 and upload it yourself in YouTube Studio or the YouTube app. On a phone that supports it, the share button after export opens your phone’s share sheet with the file.