Video Aspect Ratio Changer
Drag and drop your video here, or click to browse. Rescale to standard sizes locally without uploads.
Adjustment Panel
Modern Aspect Ratio Rescaler
Resize and crop your videos client-side to adapt to TikTok, YouTube, Instagram, or widescreen formats. No uploads required, preserving 100% of your privacy.
Blurred Sidebands Mode
Fits your landscape video inside portrait (9:16) containers by mirroring a scaled, blurred replica behind it. Extremely popular for professional social reels.
100% Secure Client Processing
Calculations are executed entirely inside your local browser using standard HTML5 Canvas and Web Audio contexts. Your video files are never dispatched to external servers.
Audio Track Preservation
Uses Web Audio API nodes to pull and link original sound feeds directly with canvas renders. The export procedure runs completely silently to prevent speakers noise.
Adjustable Resolution Sizes
Choose from 480p, 720p HD, and 1080p Full HD scales. Higher dimensions prioritize frame fidelity, while lower configurations accelerate processing.
Local Browser System Limits
Because this tool records canvas frames live using standard browser capabilities, processing is dependent on local CPU speed and hardware memory. Read details below to prevent crashes.
Size & Length Allocations
- Desktop LimitsMax 10 minutes duration and 150MB file size. Designed to ensure stable memory utilization.
- Mobile LimitsMax 3 minutes duration and 50MB file size. Stricter thresholds prevent WebKit/Blink engine sandboxed tab crashes.
- Real-Time Processing SpeedExport processing runs at 1x speed to sync sound tracks securely. A 30s video will take exactly 30s to export.