M4B to WEBM Converter

Convert M4B to WEBM online, for free.

Or drop files here. Max file size 1GB. Sign up for more

Advanced Options (optional)

Video Options

Video Codec

Choose a codec to encode or compress the video stream. To use the most common codec, select "Auto" (recommended). To convert without re-encoding video, choose "Copy" (not recommended).

Video Screen Size

Select a resolution for your video (width x height) in pixels.

Video Aspect Ratio

Change the ratio between width and height, for example, 4:3 or 3:2

Video Frame Rate

Change FPS (frames per second) of video

Rotate Video

Video will be rotated clockwise.

Flip Video

Add Subtitles

Choose a file Browse

Upload a .srt or .ass subtitle file to be burned into your video.

Audio Options

Audio Codec

Choose a codec to encode or compress the audio stream. To use the most common codec, select "Auto" (recommended). To convert without re-encoding audio, choose "Copy" (not recommended).

Adjust Volume 100

100

100% represents the original volume. To double the volume, increase it to 200%. To reduce volume by half, select 50%

Fade In Audio

Fade Out Audio

Trim Settings

Trim Start

Specify the start position of trim (HH:MM:SS). Leave at 00:00:00 to disable.

Trim End

Specify the end position of trim (HH:MM:SS). Leave at 00:00:00 to disable.

What is an M4B (MPEG-4 Audio Layer) file?

MPEG-4 Audio Layer (M4B) is the file format that stores audiobooks and podcasts, primarily those that are available on iTunes. The cool thing about this file format is that, unlike MPEG-Audio Layer III (MP3), M4B can store digital bookmarks. This feature allows readers to pause and resume later, just like a physical bookmark in a printed book!

How to open an M4B file?

The default program for opening M4B files is iTunes. For cross-platform access, VLC media player is a very dependable option that works on Mac OS X and mobile.

On Windows, several options are available. They include Windows Media Player, MediaMonkey, Winamp, and Helium Music Manager.

Developed by: Apple Inc.

Initial Release: 1999

Useful links:

https://www.lifewire.com/what-is-m4b-format-2438562

https://www.lifewire.com/m4b-file-2621958

What is a WEBM (WebM) file?

WebM (WEBM) is a freely-licensed file container designed for the Web. Specifically, it was designed to be compatible with HTML5, originally. It supports chapters, captions, subtitles, metadata tags, streaming, attachments, 3D codecs, 3D containers, and hardware players. WEBM compresses video streams with VP8 or VP9 codecs, and audio with Vorbis or Opus codecs.

How to open a WEBM file?

VLC media player and MPlayer can open WEBM files on any operating system (OS). Other good choices for opening WEBM include Winamp for Microsoft Windows OS, and Elmedia for Mac OS X.

Microsoft browsers do not have built-in WebM codecs. Therefore, install the codecs separately. However, most browsers support WEBM files.

Developed by: Google; CoreCodec, Inc.

Initial release: 2010

Useful links:

https://en.wikipedia.org/wiki/WebM

https://tools.google.com/dlpage/webmmf/

Convert other files to WEBM format

FreeConvert.com can convert your other files to WEBM format:

Convert Your M4B files to other formats

FreeConvert.com can convert your M4B files to these other formats:

Related Tools

Want to convert large files without a queue or Ads?

Upgrade Now