Resize Video
Choose a compatible video, set an exact output size or keep its proportions, then create a new local video download.
Local processing: this page creates a newly encoded video in your browser. Your source file is never uploaded.
Checking browser video-recording support…
MP4, WebM, Ogg video, or MOV up to 150 MB and 5 minutes. The browser must be able to decode it.
Output: 16–1920 px per side and 2 megapixels or less.
Choose a video to begin.
RESIZED VIDEO
A QUICK WALKTHROUGH
How to use this tool
- Choose an MP4, WebM, Ogg video, or MOV file up to 150 MB and wait for its dimensions to load.
- Enter output width and height, or keep the aspect-ratio lock on while changing one dimension.
- Create the resized video, preview the actual browser-encoded result, and download it.
A real, newly encoded video
This tool draws decoded video frames to a canvas at the chosen dimensions, captures that canvas, and records it with the browser’s supported video encoder. The download is a new video file, not a renamed source file. WebM is usually selected; some browsers can instead create MP4. The displayed MIME type and file extension always match the recorded result.
Defined local limits
Source files are limited to 150 MB and five minutes. Output dimensions must be 16–1920 pixels per side and no more than 2 megapixels, which keeps the canvas memory bounded. The collected output is capped at 400 MB. Videos must be decodable by the current browser, so codec support for MP4, MOV, Ogg, and WebM differs across browsers.
Audio and browser compatibility
When the browser can decode the source audio, the tool routes it into the new recording with the video. A current browser needs Canvas captureStream, Web Audio, and MediaRecorder support; if a compatible local video encoder is unavailable, the page does not produce a misleading download. Files stay on your device and are never uploaded.
GOOD TO KNOW
Common questions
Will the resized file keep its original format?
Not necessarily. The browser records the canvas using its first supported local video MIME type. This is usually WebM; a browser that supports MP4 recording may create MP4. The page labels the real MIME type before download.
Does it preserve audio?
The page includes audio when the browser can decode the source audio track and route it into the recording. A silent source, an unsupported audio codec, or browser recording limitation can result in video without audio.
Why is my video rejected?
The source must be up to 150 MB, five minutes or less, and decodable in your browser. The requested output must be 16–1920 pixels on each side and 2 megapixels or less.
Does the video leave my device?
No. The selected file, frame drawing, recording buffer, preview, and download all stay in your browser.