Online M4B Converter

Convert M4B files to MP3, WAV, M4A, FLAC, OGG, and other audio free online.

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How to Convert M4B Files online? - 3 Steps to Go!

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Step 1: Upload M4B files

Add M4B file(s) to the interface above for converting to MP3 or any other formats. Supports converting M4B to audio files in batches.

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Step 2: Convert M4B files free

Adjust related parameters if needed. Then, just click CONVERT button to start the conversion process.

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Step 3: Save Converted M4B Audio File

When the conversion process is complete, you can preview the file. Click the Download button to save the final files to local or to Dropbox.

Why Choose to Convert Files?

Watermark and Ads Free

Online UniConverter is a free online video & audio converter, which never adds watermarks or ads to the converted videos.

Support Multiple Formats

Online UniConverter supports a list of video/audio formats, including MP4, MOV, MKV, WAV, and Android/iPhone compatible formats.

Browser Compatible

Online UniConverter also works with Google Chrome, Safari, Firefox, and your smartphones without limitation.

High Quality Output

The converted files will keep the quality as higher as original, and you can download or save to Dropbox easily.

Privacy and Safety

We keep your information secure all the time. All uploaded files will be deleted from the server after 24 hours.

Easy to Use

We provide clear guide and steps for online conversions. It's easy to use for beginners.