Compress WEBM Video Files

Fastest online Loseless/Lossy WEBM Video compressor for free.

Setting these options is optional. The default values are a good start for most cases.
Video codec
Reduce Video File Size
If your file is 10 MB, then selecting 75 will produce a 7.5 MB file. If you make the output file size too small, then output video quality may suffer.
Video Resolution
Reducing RESOLUTION can prevent pixelation or blur when compressing high-resolution files.

Steps to compress WebM Video using XConvert for free?

  1. Use + Select Files button to open file upload options
  2. Select Google Drive, Dropbox or From Computer button to prompt file select dialog
    1. Dropbox and Google Drive allows fast upload
  3. Change options from General Options section to apply for WebM video files
  4. Click on Compress Now to start WebM video compression
  5. Click the Download button on the file card to download the compressed files

What is WebM Video?

WebM is an open video container form Google. It is a container for VP8/VP9/AV1 (video) and Vorbis/Opus (audio). VP9 is the latest format and offers 25-50% size reduction. While VP9 supported by most browsers, desktop video players lask support. You may download video player like VLC to play them. XConvert support compressing of WebM with VP8 and VP9. The main factor that relates video output quality to size in WebM compression is called CRF (Constant Rate Factor). CRF is a rate control factor (quality/file size) for VP8/VP9 encoders. Lower values of CRF produce larger output sizes but has higher quality. To reduce high-quality large file without loosing quality, you can use a slower Preset to compress it more.

What is XConvert WebM Video Compressor?

Our free online WebM Video compressor allows you to compress WebM files without limitations. It is the fastest online free WebM video compressor on the web. You can compress a WebM video (.WebM) by setting Constant Rate Factor (a General Option) to ~21 and Preset to medium to get an amazing quality compressed WebM video.

Another way to compress WebM files is to resize them to a smaller size. You can use the Resize dropdown on Output Dimension section to select a Preset Resolotions such as 8k, 4K, 1080p, 720p, 480p, 360p, 240p, and other non-standard options to reduce WebM video width and height.

Or you can set WebM Video width and height relatively or independently. Setting relative is preferred if you want to keep the aspect ratio intact.

How to open WebM Video file on Windows Operating systems?

Most WebM videos you take from iPhones and Androids converted to .WebM format or .webm. These formats can be open using VLC Player . In fact, VLC can open almost any WebM video format and support Linux and MacOS platforms.

How to open WebM Video file on Linux Operating systems?

The default option is to install VLC player. On Ubuntu (Debian) you can run sudo apt-get install vlc. Make sure you have X11 installed.

How to open a WebM Video file on Mac OS?

Quick Time does not support .WebM file format. You will need to install VLC player to be able to view WebM video on MacOS.

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How to compress WEBM videos online?

Click and select or Drag and drop your .webm files to dark blue box. Once you add all of your WEBM videos , simply press Compress. This will compress all of your WEBM files. Just wait until we process your files to download them as a ZIP file or individual images.

Perfectly compress WEBM

We don't compromise quality for anything. Our advance video converter detect the best quality for your output files. This feature enable us to keep the best quality while reducing WEBM file size.

Effortless convert

Makes your life little simpler. We do our best to separate all details need to compress WEBM video files so that you can just convert files with a press of a button

More About .webm Files

Similar to the MKV file extension, WEBM is a file format developed by a number of parties, including Google. Launched in 2010, it is open source format designed to deliver video through the web. It can be used for a variety of types of video, from video calls to high definition movies. WebM is growing, and by using the HTML5 version of YouTube, it is possible to watch video encoded in WebM.
Like the MKV file extension, the WEBM extension is developed by various online parties such as Google, it is a freeware offering streaming of online video content and it was first developed in 2010. By using the HTML5 version of YouTube one can watch video encoded in WEBM.
WebM benefits from being designed for use on the modern web, rather than for local use. This means the format is specifically designed for the wide range of devices that are used to access the web, from Smart Phones to Powerful PCs. The video element of the file is encoded using VP8 video codec and the audio element of the file is encoded using the Vorbis audio codec.
Encoding and deciding in WEBM format is possible while using the ffvp8 software or libvpx from the Google support. When it comes to the Android support a version of 2.3 (Gingerbread) and above allowing playback of WEBM format can be used for encoding and decoding. Back in 2001 using Rockchip a full hardware implementation of 1080p VO8 encoding was made possible.
Developed By
Google (Previously developed by On2, Xiph, and Matroska)
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