Video ResizerResize videos to any resolution or dimension in your browser.

The Video Resizer loads the video via an HTML5 Video element and creates a Canvas at the target dimensions. During processing, each video frame is drawn onto the canvas using drawImage() which handles the scaling. The canvas uses the browser's built-in image scaling algorithm for quality. For downscaling, the canvas produces smooth results; for upscaling, quality depends on the scaling factor. The canvas stream and audio (captured via Web Audio API) are combined and fed to MediaRecorder. Aspect ratio maintenance is calculated by fitting the video within the target dimensions while preserving proportions, optionally adding letterboxing. The tool supports both constrained (aspect ratio locked) and free (independent width/height) resizing modes.