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How to Use a WebM-to-MP4 Converter

Edited by Pat Bitton

October 28, 2019

WebM is a fairly new video format developed by Google as an alternative for the widely used the MP4 format. To play WebM files on your computer or mobile device, you’ll probably have to install a special player, components, or plug-ins. But there is an easier way: just turn a WebM file into any popular video format, e.g., MP4, then open it with no problems. In this article, you’ll learn how to do WebM-to-MP4 conversion using any of three types of software, as well as the difference between the two formats.

How to Convert WebM to MP4 with Movavi

Movavi Video Converter is a great choice for conversion; with this program, you can change WebM files to MP4 in no time, even if you’ve never done it before. The app also supports dozens of other formats, including HD. To try these and other powerful features in Movavi Video Converter, download the appropriate version for Windows or Mac and follow the steps below.

Easily convert WebM to MP4 using our short and simple guide.

Install the Program

Run the downloaded file and follow the on-screen instructions.

Add Files for Conversion

Click the Add Media button in the program interface, select Add Video, and add a file in WebM or any other format that you want to transform into MP4. You can add more than one file to take advantage of the built-in batch conversion feature.

Edit the Files before the Conversion Process (Optional)

You can first edit your videos in the app’s editing tool. Access it via the Edit button in the right part of the file info section.

Try changing the parameters in the Stabilization tab to improve your shaky footage videos. Adjust the sound volume in the videos or even lessen background noise in the Audio tab. Set the brightness, contrast, saturation, and many other parameters in the Adjustments tab. Apply different filters to your videos in the Effects tab. Insert subtitles in Subtitles or add a particular watermark in the respective tab. Trim details you don’t want, rotate your footage, or cut its edges in the tabs Trim, Rotate, and Crop.

Compress Your WebM Files (Optional)

You can also use the converter to easily shrink large files. Click the size value indicated in the file description. A dialog box will open, in which you can choose the size, quality, and bitrate values. Click the Convert Sample button once you’re finished to check how the resulting file will look like.

Specify the Output Format

Expand the Video tab at the bottom of the program window and click MP4. You’ll see a list of presets for MP4 videos – choose the one that suits you best. To ensure the file is compatible with your mobile device, open the Devices tab and choose the preset for your device.

Start Converting WebM to MP4 and Save the Results

When you have set all the parameters, click the button with the Folder icon and choose the directory for your output files. You can use the default folder or select another. Finally, click Convert to transfer your file(s) to MP4 or any other format you like.


Movavi Video Converter

The ideal way to get your media in the format you need!

  • Convert video, audio, DVDs, and image files
  • Enjoy lightning-fast conversion without quality loss
  • Improve quality, adjust sound, trim and join files before converting
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Differences between Desktop and Online Converters

Online Video Converter
  • Long-time wait
  • Limited file size
  • Popular formats supported
  • Slow conversion speed
Movavi Video Converter
  • 0-second wait
  • No size limits
  • 180+ formats, presets for 200+ devices
  • High conversion speed
  • Online user support

How to Convert WebM to MP4 Online

You can also change the format of your WebM files online with a web service. Learn how to convert WebM to MP4 online by following the steps below.

Open the Website

Click the link below to visit the online service.

Open the conversion service

Upload the File

Click the Add Your Media button, locate your WebM file, and click Open.

Keep in mind that the service has the size limitations, and you can’t convert large files this way.

Convert the Video

Click the Convert button and wait until the conversion process is finished. Your file will be downloaded to your computer automatically after the conversion.

How to Use a Free WebM-to-MP4 Converter

Another option is to convert WebM to MP4 for free using VLC Media Player. Download the installation file by clicking the link below.

Download VLC Media Player

Open the installation file, follow the onscreen instructions to install the player, and launch it. Click Media, then choose Convert / Save. In the dialog window that opens, click the Add button to import your WebM file for conversion. Next, click the Convert / Save button in the lower-right part of the dialog box. In the next window, select MP4 as the target format. Then choose the destination folder for your converted file and type the file name. Click the Start button to launch the conversion.

WebM vs. MP4: What’s the Difference?

Both WebM and MP4 are good for video storage and streaming, but WebM files tend to be a little smaller than MP4 files and are easier to embed into browsers, while MP4 is more of a device-friendly format supported by many device manufacturers. Here’s a short table about WebM vs. MP4 distinctions.

Comparison parameterWebMMP4
File extension.webm.mp4, .m4a, .m4p, .m4b, .m4r, and .m4v
Audio codecsVorbis, OpusMPEG-2/4 (HE)-AAC, MPEG-1/2 Layers I, II, III (MP3), AC-3, Apple Lossless, ALS, SLS, and others
Video codecsVP8, VP9, AV1H.264/MPEG-4 AVC, HEVC/MPEG-H Part 2/H.265, MPEG-2 Part 2, MPEG-4 ASP, H.263, VC-1, Dirac, and others
Supported byA number of browsers and playersAlmost any device including Apple