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How to Convert WebM to MP3 with FFmpeg and the Alternative

by Christine Smith • 2024-07-03 14:34:00 • Proven solutions

Several tools and programs are available to help convert WebM to MP3, and FFmpeg is one of the popular ones. The program uses Command-line based processing for file conversion and other tasks. The following parts of the article will help you know more about FFmpeg WebM to MP3 conversion.

Part 1. A full guide to using FFmpeg to convert WebM to MP3

FFmpeg is a free and open-source multimedia framework that supports various functions like decoding, encoding, transcoding, streaming, and others. There are several libraries and program that facilitates handling almost all popular multimedia formats. To convert WebM to MP3 and for other tasks as well, the program use command-line based processing. With cross-platform support, the program is compatible with Windows, Mac, Linux, Solaris, and other systems. To convert your files using FFmpeg, knowledge of the line-commands is very important.

Steps to convert WebM to MP3 using FFmpeg:

Step 1: First of all, download the program from the link:

Step 2: Go running on your system, type cmd, and hit on the Enter key. 

Step 3: You will now get a command-line window at which you need to write at the “cd\” and press enter. Next, to enter the FFmpegTool folder, you need to write “cd FFmpegTool.”

Step 4: Next, enter the command for converting WebM to MP3- 

ffmpeg -i "${FILE}" -vn -ab 128k -ar 44100 -y "${FILE%.WebM}.MP3";

where FILE is the WebM file that you want to convert.

ffmpeg webm to mp3

Part 2. The best alternative to FFmpeg to convert WebM to MP3 recommended

If you are looking for an effective yet simple solution for converting your WebM files to MP3, professional software Wondershare UniConverter is just the right tool. This versatile program supports more than 1000 formats to facilitate conversion in almost all formats required. The software also supports Device-specific conversion. The software results in lossless quality files, and with batch processing, multiple files can be processed at a time. A built-in editor allows customizing your files using features like cutting, cropping, adding effects, and more.

Wondershare UniConverter logo Wondershare UniConverter - Best WebM Files to MP3 Converter

Your Complete Video Toolbox

video converter ultimate
  • Convert WebM format files to MP3 and other 1,000+ formats with high-quality output.
  • Convert MP3 to optimized preset for almost all of the devices
  • A batch conversion that processes multiple files at a time
  • Leading APEXTRANS technology ensures lossless compression at 90 times faster than other converters.
  • Edit, enhance & personalize your videos file.
  • Burn video to playable DVD with attractive free DVD templates.
  • Download or record videos from 10000+ video sharing sites.
  • Versatile toolbox combines fixed video metadata, GIF maker, VR converter, and screen recorder.
  • Transfer files to external hard drives, USB flash drives, Android devices, Apple devices, and other devices
  • Supported OS: Windows 10/8/7/XP/Vista, Mac OS 10.15 (Catalina), 10.14, 10.13, 10.12, 10.11, 10.10, 10.9, 10.8, 10.7, 10.6
security Security Verified, 5,942,222 people have downloaded it.

Steps to convert WebM to MP3 using Wondershare UniConverter

Step 1 Add WebM files to Wondershare UniConverter.

Launch the Wondershare software on your system, and from the main interface, select Converter on the left-hand panel. Click on the add files icon at the top-left corner to browse and load the WebM files from your system. Alternatively, you can also click on the + sign or drag and drop the files to the interface.

add webm files to ffmpeg alternative

Step 2 Choose MP3 as the target format.

Expand the Output Format tab at the bottom-left corner and from the Audio list, select the MP3 format. Also, choose the output file quality.

choose mp3 as the target format

Step 3 Convert WebM to MP3.

The system location where you want to save the converted files can be selected at the File Location tab. Finally, click on the Start All button to convert the added files. The Finished tab shows the processed files after the process completion.

convert webm to mp3 with the ffmpeg alternative

Part 3. A comparison table between FFmpeg and Wondershare UniConverter

The table below compares FFmpeg and Wondershare UniConverter as tools for converting WebM to MP3 on various parameters.



Wondershare UniConverter

Platform support

Windows, Mac, Linux, Solaris, and others

Windows and Mac

Format supports

All major formats

More than 1000 formats

Video Editing


Yes, all major editing functions like trim, crop, cut, and others supported

Option for preview



DVD and Blu-ray burning



Batch conversion




Free and open-source

Paid software with a free trial version


FFmpeg works as a decent conversion tool only when you are well aware of the line commands. For quick and simple conversion in a professional manner and with support to an array of additional features, Wondershare UniConverter works as the best program.

Christine Smith

Christine Smith

chief Editor

Resource > MP3 Solutions > How to Convert WebM to MP3 with FFmpeg and the Alternative