Video Aspect Ratio Changer Guide
Resize + pad/crop to a target aspect ratio with FFmpeg.wasm.
Use this quick guide to get clean output, avoid common issues, and keep your workflow fast and private.
Quick Start
- Open the tool and run a small sample first.
- Choose the target output format or settings.
- Validate quality once, then process your full input.
Best Practices
- Prefer standard formats for maximum compatibility.
- Balance output size and quality based on your use case.
- Use browser-mode tools for privacy-first workflows.