Repurpose long-form clips into Shorts without a cloud timeline. Supercut reframes and captions locally so your source masters stay private.
Just type
“Crop for YouTube Shorts and add captions”
Works with
Load the source video in the editor, with no upload.
Say “Shorts vertical with captions” or trim to under 60 seconds first.
Download a vertical captioned file and upload to YouTube from your device.
Supercut decodes, edits and exports your video entirely in your browser with WebAssembly. Your video files never leave your device. To plan the edit, the AI gets your request, the words said in your clip and its sound levels (both worked out on your device), and a few low-resolution frames only if you turn that on. Read more in our Privacy Policy.
Edit videos for TikTok in your browser. Auto 9:16 reframe, captions, and export, your footage never uploads to TikTok or anyone else first.
Edit Reels in your browser, 9:16 reframe, captions, trims. No upload to Instagram or a cloud editor; footage stays on your device.
Trim and cut video in your browser. Drop a clip, say where to cut, and download it, your footage never leaves your device. No upload, no watermark.
Reframe to 9:16, add viral captions, trim hooks, and export TikTok-ready clips in your browser. No upload before you post.
Trim highlights, reframe to vertical, caption, and compress for Discord, in your browser. Big gameplay files are handled on your device, no upload.
9:16 vertical, ideally 1080×1920, typically under 60 seconds for Shorts feed placement.
Yes. Ask to trim to the hook you want, then reframe to vertical.
No. Shorts prep runs entirely in your browser.
Drop a clip and describe the edit, it runs right here in your browser.
Open the editor