How to Convert WEBM to M4B Online?


Add WEBM file(s) that you want to convert.


Select M4B as the output format you want to convert WEBM file(s) to.


Click CONVERT to convert your WEBM file(s).


Click DOWNLOAD to save your converted M4B file(s).

Differences Between Our Online and Desktop Converters

online converter

Online Converter

  • Long-time wait
  • Up to 100MB file size
  • Popular formats supported
  • A muximum of 2 files in one conversion
  • Slow conversion speed
fast desktop converter

Faster Desktop Converter

  • 0 second wait
  • No size limits
  • 1000+ formats supported
  • Limitless batch conversion mode integrated
  • 30X faster than any converter


Using Online UniConverter (originally, it's easy to convert WEBM files to a variety of other formats.

WEBM 转 MP4 (MPEG-4 Part 14)

WEBM 转 AVI (Audio Video Interleave)

WEBM 转 WMV (Windows Media Video)

WEBM 转 MOV (QuickTime File Format)

WEBM 转 WAV (Waveform Audio File Format)

WEBM 转 M4A (Compressed Audio File)

WEBM 转 FLV (Flash Video)

WEBM 转 OGG (Ogg Vorbis Compressed Audio File)

WEBM 转 MP3 (MP3 Audio Format)