Change Aspect Ratio of Video

About Change Aspect Ratio

This online tool allows you to change video aspect ratio directly in your browser. Perfect for converting videos for different platforms - make vertical videos for Instagram/TikTok, square videos for posts, or widescreen for YouTube. Choose how to fit: crop, add padding, or stretch. All processing happens locally for complete privacy.

What aspect ratios are supported?

Common ratios: 16:9 (YouTube), 9:16 (Instagram Stories/TikTok), 4:3 (Standard), 1:1 (Square), 21:9 (Ultrawide), 3:4 (Vertical 4:3). You can also set custom ratios.

What's the difference between Crop, Pad, and Stretch?

Crop: Fills the new frame by cutting edges (no distortion). Pad: Adds black bars to fit (keeps all content). Stretch: Distorts video to fit exactly (may look unnatural).

What are padding color options?

Black (classic letterbox/pillarbox), White (bright background), or Blurred (uses blurred video as background for aesthetic look).

Will this affect video quality?

The video will be re-encoded. Choose High quality for best results. Quality impact depends on chosen settings and target resolution.

What is the file size limit?

Maximum file size is 100MB. This ensures smooth processing in your browser.

Can I preview before downloading?

Yes! After processing, you can preview the video with new aspect ratio before downloading.

Is my video file safe?

Absolutely! All processing happens in your browser using FFmpeg.wasm. Your video is never uploaded to any server.

How long does processing take?

Processing time depends on video length and settings. Typically 30-60 seconds for a 5-minute video.