convert mp4 to webm
MP4 to WebM Converter - UniConverter
  • Convert MP4 to WebM, MOV, FLV, MKV, MP3, WMA and other 150+ video/audio formats.
  • Download videos from YouTube, Facebook, Vimeo and over 1,000 popular sites.
  • Burn video to DVD with free attractive templates.
  • Built-in video editor allow to trim, crop, add subtitle, watermark, effects to the video.
  • Transfer video to iPhone, iPad, Android and other devices easily.
  • Powerful toolbox includes: Fix Metadata, GIF Maker, Screen Recorder, Video Compressor, etc.

How to Convert MP4 to WebM with the Best MP4 to WebM Converter

by Brian Fisher

- "What is the best MP4 to WebM Converter? I'm looking for a way to convert MP4 file to WebM."

You should convert your files from MP4 to WebM if you regularly upload videos to the web. What is WebM?

WebM is a media format specifically designed for the internet. The quality difference between MP4 and WebM is minimal though WebM is a bit inferior. However, it all boils down to the codecs used in each format. Converting MP4 files to WebM format is straightforward. You just need to download the software, load your MP4 file into the converter, choose the output format and hit Convert. Voila!

Part 1. The Best Solution to Convert MP4 to WebM on Mac

Here I would like to introduce you to an easy-to-use way to convert MP4 to WebM on Mac, including the newly macOS 10.15 Catalina. No matter how you get the MP4 video file, such as download it from some normal sites, shoot it using your HTC and the like. With the help of a great tool UniConverter, you can finish converting MP4 to WebM on Mac without hassle.

Simple Gudie to Convert MP4 to WebM with UniConverter

Step 1. Import MP4 files to WebM converter for Mac and Windows

After launching the application, click "Add Files" to import MP4 files to this WebM converter. Or you can just drag and drop the MP4 files to this MP4 to WebM converter.

mp4 to webm mac

Step 2. Choose WebM as your output format

In the Video category of the format tray, select "WebM" as the target format. Here you could also set the output resolution, frame rate, bit rate or more advanced encode settings.

convert mp4 to webm mac

Step 3. Start to convert MP4 to WebM

Once completed all the settings, return to the main interface and click the big "Convert" button on the right of each video clip, or click the "Convert All" button on the bottom right if you have various videos to be converted into WebM. Then let this smart WebM converter do the rest for you. This MP4 to WebM converter supports batch conversion, so you can add multiple MP4 files and convert them at a time. By the way, if you want to convert WebM to MP4, please check here to learn more.

mac convert mp4 to webm

Get the Best MP4 to WebM Video Converter - UniConverter

  • Support converting from and to more than 150+ video formats, including MP4, WebM, MOV, AVI, FLV, VOB, WMV, etc.
  • Edit videos with built-in editing tools, like Trim, Crop, Effect, Add Effects, Subtitles, Watermark, etc.
  • Tranfer converted MP4 or WebM video to mobile devices like iPhone, iPod, iPad or Android Phone and tablets, etc.
  • Download online videos from YouTube, Vimeo, Metacafe, Facebook, Vevo and 1,000 more streaming websites.
  • Various useful handy tools like GIF Maker, VR Converter, Cast to TV, Screen Recorder, etc.
  • Fully compatible with macOS 10.7 and above, up to the lastest macOS 10.14 Mojave and Windows 10/8/7/XP/Vista.

Part 2. How to Convert MP4 to WebM with FFmpeg

For converting videos from MP4 to WebM using FFmpeg, you would require 2 applications such as Firefogg Firefox extension and a video converter. Both these tools are restricted at some or the other point. While Firefogg doesn’t support batch conversion, a regular video converter might not support complete conversion features for videos.

FFmpeg is an open source command line utility suitable for Mac or Linux systems. It is mighty and fast with lot of flexibility. But, a novice user might find it tough to use and understand.

Note: The basic format for a FFmpeg command is denoted as follows:

ffmpeg [global options] [input file options] –i input-file-name [output options] output-file-name

Steps to Convert MP4 to WebM using FFmpeg

Step 1. Install FFmpeg on your Mac after getting ‘Homebrew’

Following command will install and builds FFmpeg and prepares the libraries for converting MP4 to WebM format. On a Linux machine, you got to search the right FFmpeg package and install it accordingly.

Go to your Mac ‘Terminal’ and type ‘brew install ffmpeg --with-libvpx --with libvorbis --with-fdk-aacc’.

Step 2. Convert a single file

Once, installation has been down, you need to convert a file. Visit the ‘Terminal’ window on your MacBook. In case, you have the file on your desktop –

Go to ‘cd ~/Desktop’

Now, run the FFmpeg command over the file:

Ffmpeg –I input-file.mp4 –c:v libvpx –crf 10 –b:v 1M –c:a libvorbis output-file.webm

Once the command is over, a fresh WebM file is generated. This is the traditional way of converting a MP4 video to WebM. The settings need to be tweaked for better results as per your source file’s size and quality.

Part 3. Top 10 Free Online MP4 to WebM Converter

#1. Online Audio Converter & Video Converter

If you don't want to install a computer program, you can also try online video converter to convert MP4 to WEBM online for free. Try it below.

Note: You will get the watermark in your video with this MP4 to WebM converter.

convert video to webm mac

#2. Zamzar

Zamzar is an online converting tool which helps you in converting your MP4 files to WebM file format immediately. It works flawlessly and also allows you to convert MP4 files or other file formats to any media player or mobile devices easily. It is regarded as the best online converter which provides video, audio and other conversions. It also supports HD file formats.

- User-Friendly interface.
- Personalization features.
- It supports more than 300 file formats.
- You can receive your file in your email-id after conversion.
- It can convert the MP3 videos with subtitles.

- You have to use your e-mail to receive the converted file which may go to your spam folder.
- You cannot create temporary folders to save you’re the conversions of file format.
- Streaming of audio files reduces its quality.

convert video to webm mac

#3. MP4 to WebM Converter

Need a video conversion without loss of quality? Then this is one of the best online video converters for a superior quality WebM video. The procedure is quite simple, and the interface is clean and easy to navigate. You can load the file for conversion through URL or drag a file and drop it on the converter. You can also choose the file from Dropbox, Google Drive, URL or your device. After that wait for the conversion process and download your converted file into your system.

- Quick conversion method.
- Use file from different sources for conversion purpose.

- Website deletes data from the site after one hour.

mp4 to webm converter online

#4. online-convert

The online-convert converts your MP4 file to WebM (VP8 codec). This converter allows you to convert MP4 to WEBM online and also change some settings for your output file. It gives you a lot of freedom to choose the qualities of your file. Free users can do a batch conversion of 4 files of 100MB each.

Upload the videos you want to convert from your device, Dropbox or Google Drive. You may also convert an MP4 file to WebM through the video’s URL. Choose the settings for the output video. If you’re unsure, you may leave these settings blank. The converter will still convert your file without any issues. Click on Convert file to start the conversion.

- Quick conversion time.
- Provides high-quality video format.
- Supports a vast number of formats.
- Offers a lot of control on the output video settings.

- Batch conversion restricted to 4 files.
- File size limited to 100MB.

free webm to mp4 converter online

#5. Convertio

Convertio is one of the best MP4 to WebM converter that requires no installation. It supports more than 12,000 different format conversions. Load files from your local device or select files from Dropbox, Google Drive or directly through the URL of the video. The file size is limited up to 100 MB only.

The conversion system is straightforward. Select the file from local drive, Dropbox, Google Drive or through and select the format of your output file. Then download your WebM file into your system. You may also choose to save your output file directly to Google Drive or Dropbox.

- Quick online conversion.
- Add files from multiple sources.

- Limited file size up to 100 MB only.
- Sometimes conversion process may not run smoothly.

convert mp4 to webm online

#6. Cloudconvert

Cloudconvert supports 218 formats for conversion and has a robust API system allows users to use it in their applications. No need to install any software. This conversion tool also offers cloud storage so you can access your file from any device.

Select your MP4 file to convert. You can give it a URL for the video or select a file from Dropbox, Google Drive, One Drive, and Box. Once you load your MP4 file, you will see the following screen. Select the format WebM for your output file. Now click on Ready to convert.

- No installation required.
- Quick time conversion.

- Cloud storage required.
- Cannot edit videos.

online convert mp4 to webm

#7. FreeFileConvert

FreeFileConvert is a simple and fast conversion tool. The interface is pretty neat and easy to follow even for beginners. The converter not only converts MP4 to WebM online but is also helpful in converting various other files like audio, eBooks, document, image, and fonts. The converter supports all the essential formats and has many free tools as well.

Choose a file from the browser, Cloud, or URL. Then select an output format. We will choose WebM here and click on Convert.

- Bulk conversion of 5 files.
- Easy to use.

- Limited file size of up to 100 MB only.
- May take some time to convert.
- Bulk conversion size restricted to 100 MB combined.

mp4 to webm conversion

#8. Aconvert

Aconvert is a free online converter that supports multiple formats. It allows batch conversion for up to 6 files; however, each file size is limited to 24MB only. For a single file conversion, you may choose a file of 200MB maximum.

Choose a file or paste a video URL. Choose the target format, i.e., the format for your output file. We will choose WebM. Through options menu, make any changes you want such as changes in frame rate, bitrate or size. After that click on “Convert Now” to start conversion. The conversion result is displayed once the conversion is complete.

- Provide conversion result at the end of procedure.
- Allows batch conversion.

- If some error occurs, you have to repeat the procedure again.
- Batch conversion restricted to 6 files, 24MB/Each.
- Video file limited to 200MB for a single file conversion.

mac mp4 to webm

#9. Converterpoint

The best HTML 5 video converter for the three popular formats; MP4, WebM, and OGV. It requires no signup or installation. You may also set various settings for your output file. There is no batch conversion, but you can upload file size of up to 4GB.

Upload the file to convert from your device. Once you upload the video, change any settings you want or choose the default. Click Continue. A new window will appear. Select WebM and start Conversion.

- Virus free conversion.
- Quick start after formatting.
- Upload file size up to 4GB.

- File upload is slow but depends on internet speed and size of file.
- No batch processing.

convert mp4 to webm online

MP4 to WebM conversion is not difficult. All the tools described above are free online and don’t require any installation or registration. Though each has their limitations, you can choose the one that works for you. You can also buy their premium services for more functionalities and freedom.

MP4 vs WebM: Differences between MP4 and WebM

Category MP4 WebM
File Extension .mp4 .webm
Developed by Moving Picture Experts Group Google
MIME Type Audio/mpeg video/webm
Description MP4 is a widely used video format which consists of video, audio, subtitles and images in a single file format. It is a multimedia container which uses the H264 video codec. WebM is a popular video format specially designed for the web. It is one of the video standard format which supports HTML5.
It consists of video streams which are compressed with VP9 & VP8 video codecs, WebVTT text tracks, Opius/Vorbis audio codecs and audio streams.
Associated Programs Apple QuickTime Player, Apple iTunes, VideoLAN VLC Media player and Microsoft windows Media player Google Chrome, Mozilla Firefox and VLC Media player
Supported device Apple, Sony, Android, Microsoft and other portable devices Sometimes it does not support mobile devices
Pros Ease of compressing small files with zero quality loss
MP4 provides high quality video compared to WebM
Better Video playback
Free application
High quality video
Can be streamed on video sharing websites like YouTube.
Cons For online MP4 file streaming it is Time consuming due to pre-buffering Poor compatibility with portable devices and other media players
Supported Codecs H.264 video codecs
Audio Streams compressed with Vorbis/Opus
WebVTT text tracks

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Brian Fisher

staff Editor