🎞️ B-Roll Assembly Tool
Insert B-roll footage into your video at specific timestamps using AI-generated JSON. Choose from multiple transition styles.
🔒 Browser-Based📁 No Upload⚡ Instant
Free uses remaining: 3 / 3
🎞️
B-Roll Assembly
Insert B-Roll clips into your video using AI-generated JSON
Sign up to unlock →📖 How to Use
1
Get JSON
Use AI Prompts (B-Roll tab) to generate insertion timestamps.
2
Upload Video
Select your original video.
3
Upload B-Roll
Select the B-roll video clips.
4
Choose Transition
Pick Cut, Fade, or Crossfade.
5
Assemble
Click to assemble the final video.
❓ Frequently Asked Questions
What JSON format is needed?
Array with "start", "end" in seconds, and "description": [{"start": 12.5, "end": 18.0, "description": "City skyline"}]
How many B-roll clips can I insert?
As many as you have clips. Each insertion point maps to a B-roll clip in order.
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