Tools
addfile.app

Resize & Rotate Video

Reels/TikTok 9:16, 1:1, 16:9; rotate, speed up

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Nothing is uploaded — every step runs in your browser.

Fit your video to 9:16 for Instagram Reels, TikTok and YouTube Shorts, 1:1 or 4:5 for posts, or 16:9 for YouTube. Fill empty space with a blurred background or black bars, rotate, mirror and save at 0.5×–2× speed. Everything runs on your device.

How it works

  1. 1Choose your videos.
  2. 2Pick format, fill style, rotation and speed.
  3. 3Press “Resize & Rotate Video” and download.

Frequently asked questions

What is the blurred background?

The video itself is enlarged and blurred behind the frame, a popular social-media look instead of black bars.

What happens to audio when speed changes?

Audio is removed for speeds other than 1×.

Can I fix sideways phone videos?

Yes, rotate by 90°, 180° or 270°.

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