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Video Resizer & Cropper

Reframe a video for another platform: vertical 9:16 for TikTok, Reels and Shorts, square 1:1 for feeds, 16:9 for YouTube. Crop to fill, or fit with coloured bars.

  • Free, no sign-up
  • Files never leave your device
  • Powered by FFmpeg
  • No watermark
Loading tool…

Your files are processed on this device and are never uploaded to a server.

How to use the Video Resizer & Cropper

  1. 1

    Choose a video.

  2. 2

    Pick the target aspect ratio and resolution, and crop or fit.

  3. 3

    Convert and download.

Crop or fit

Crop fills the frame completely and cuts off the edges, centred on the middle of the video. Fit keeps the whole picture and adds bars in the colour you choose.

Frequently asked questions

Is my video uploaded?

No. Processing uses FFmpeg compiled to WebAssembly and runs entirely in your browser. Your files never leave your device.

Why is it slower than desktop software?

Browser processing runs on a single CPU thread without hardware encoders. Short clips finish quickly; for long 4K videos, reducing the resolution to 1080p or 720p speeds things up considerably.