expand videos seamlessly with the AI video extender
Instantly expand your video's background using AI - no cropping, no black bars, and no reshooting. Perfect for repurposing content across any platform.
Social media resizing for any platform
Got TikTok content that needs to work on YouTube? Transform vertical videos into horizontal formats that look professionally shot for each platform.
Fill 4K and wide screen formats perfectly
Convert vertical footage into cinematic widescreen by expanding the background with crystal-clear AI generation. Great for YouTube, presentations, or when you need that TikTok to fill screens perfectly.
Create space for branding and overlays
Use AI to expand the background while keeping the hero of your video front and center. Perfect for branded content, tutorials, or social posts with on-screen CTAs that don't crowd your talent.
Try LTX Scaler today to
Add background expansion
Get effortless aspect ratio conversion
Make space for captions, CTAs, and branding
Extend videos, not timelines
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AI Video Extender
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Resize video for any platform while keeping your subject perfectly framed.
How to extend a video with AI
Can I add text or logos without covering the subject?
Yes! Our tool lets you add overlay to video content while expanding the background to create space for captions, subtitles, branding, or call-to-action elements. You can expand video layout without cluttering the main subject.
What formats does it support?
You can video expand mp4, MOV, and other common video formats with our expand video background online tool. Our AI video resizer works automatically regardless of resolution or aspect ratio.
Does it add black bars or stretch the video?
No. Our video background generator intelligently fills in the empty space with generated background content—so you get no black bars video results and can expand video naturally without distorting your subject.
Can I use this to repurpose vertical content for YouTube or desktop?
Yes! The AI extends the sides of vertical or square videos to expand video to full screen horizontal formats like 16:9. Perfect for social media resizing when you need to crop vertical to landscape—adapting TikToks or Instagram Reels to YouTube, presentations, or websites.
Can this tool make my video longer in time?
No, the AI video expander does not extend the duration of your video. It enlarges the visual background only—ideal for resizing your video to fit different screen dimensions.
What does the AI video extender actually do?
The AI video extender expands your video's background using AI-generated content. It doesn't crop or stretch the subject—it simply expands the canvas to fit wider or taller formats seamlessly.