Use Short Video Resizer in three steps
- 1
Choose a short browser-playable video.
- 2
Select dimensions, fit mode, bitrate and whether to include audio.
- 3
Start export and keep the tab open until the real-time recording finishes.
Why export takes the full video duration
The browser draws the video onto a resized canvas and records that canvas with MediaRecorder. Because it uses playback, a 30-second clip takes about 30 seconds to export.
This approach avoids uploading the video but is not a replacement for a desktop encoder when you need fast batch processing, frame-accurate cuts or MP4 output.
Browser and codec limitations
Current Chromium-based browsers provide the most reliable experience. Output is WebM because browsers do not consistently provide MP4 encoding through MediaRecorder. Source files must use a codec your browser can play.