Tutorial · Nov 8, 2026 · Animdock Team

How to resize a video to 9:16 and compress it to a target size

Reframe a horizontal video for Reels, Shorts and TikTok, change its resolution and frame rate, and hit an exact file size limit.

The Video Resizer & Compressor changes everything that decides how a video looks and how big it is — resolution, aspect ratio, bitrate and frame rate — with a live size estimate.

Editing desk with a monitor at golden hour

Image: Animdock Stock — free to download.

1. Drop the video and watch it

The video plays under the drop zone. The estimate box shows the source resolution, length, bitrate and size.

2. Pick resolution and aspect ratio

Resolution sets the short side: 2160p, 1440p, 1080p, 720p, 480p or 360p — or enter exact pixels. Aspect ratio switches to 16:9, 9:16, 1:1, 4:5, 4:3 or 21:9. With Crop to fill a red frame on the preview shows exactly what will be kept; Fit with bars keeps the whole picture.

3. Pick the bitrate

A surfer riding a wave at sunset

Image: Animdock Stock — free to download.

4. Frame rate, format, audio

Keep the original frame rate or choose 60, 30 or 24 fps. MP4 (H.264) is the safest for social apps; WebM (VP9) suits websites. Untick Keep audio for silent background loops. Press Resize video and download the result.

Open Video Resizer & Compressor — free →