Video Aspect Ratio
Free online video aspect ratio changer. Supports 1:1/4:3/16:9/9:16 presets and custom ratios. Auto-fills with black bars. Pure browser-side.
Tool Guide
Introduction
Video Aspect Ratio is a free online tool for changing video aspect ratios. Powered by FFmpeg.wasm, all processing happens locally.
Core Features
- Preset Ratios: 1:1, 4:3, 3:4, 16:9, 9:16, 21:9.
- Custom Ratio: Set any width:height ratio.
- Auto Padding: Adds black bars to preserve content.
- Batch Processing: Process multiple videos.
- Pure Browser Processing: Everything runs locally.
How to Use
Step 1: Upload video files.
Step 2: Select target ratio (preset or custom).
Step 3: Click "Start Convert" and wait.
Step 4: Download the converted videos.
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