AI B-Roll Generator
Shortzly plans B-roll from your transcript and lays it under your captions automatically. Pick an intensity, go full-frame or picture-in-picture, and fine-tune every window on a timeline.
Three Steps to Viral Shorts
Paste Your Video URL
Drop any YouTube, Vimeo, or Twitch link. Or upload your own video file directly.
AI Finds the Best Moments
Our AI analyzes your video, scores every segment for viral potential, and selects the highlights.
Download Polished Clips
Review, customize captions and face tracking, then download ready-to-post clips in any format.
Why Creators Choose Shortzly
Planned From What You Say
Shortzly reads the transcript and places B-roll where it supports the point, not at random, so each cutaway actually fits the line being spoken.
Under Your Captions, Not Over Them
B-roll composites beneath your captions, full-frame or as a picture-in-picture band, so your words stay readable the whole time.
Dial the Intensity
Choose subtle, balanced, or heavy, then retime, add, or swap any window on a timeline before you render.
Everything You Need to Create Shorts
Transcript-Timed Windows
B-roll is planned to real word boundaries from the transcript, so each clip lands on the moment it supports.
Full-Frame or Picture-in-Picture
Place B-roll across the whole frame or in a band over your footage, set per window.
Intensity Levels
Off, subtle, balanced, or heavy controls how much B-roll is used across the clip.
Timeline Editor
Retime, add, delete, or swap any B-roll window, and preview the moment before rendering.
Licensed Stock Search
Per-window search across Pexels and Pixabay, so the footage is cleared for commercial use.
Captions Stay On Top
Your animated captions always render above the B-roll, never hidden behind it.
Frequently Asked Questions
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Learn moreReady to Viral Shorts?
Paste a video URL, pick your highlights, and download ready-to-post clips. Try either plan for 7 days for $1, including 5 clips and 2 faceless reels.
Card required · Nonrefundable $1 verification charge · Regular plan price after 7 days unless you cancel