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M4B is similar to M4A but tailored for audiobooks and podcasts. It supports bookmarking, allowing listeners to resume playback from where they left off. M4B files are often used by iTunes and Apple Books for spoken-word content.
M4A is an audio file format based on the MPEG-4 standard. It typically uses AAC or ALAC codecs for high-quality sound. M4A is widely supported by Apple devices and offers better compression and quality than MP3 at similar bitrates.
Convert your .m4b files to .m4a right in your browser — no downloads, no installs. Everything happens securely in the cloud.
We never store your files permanently. Only you can access them, and they’re automatically deleted from our servers within 2 hours.
Turn your M4B files into M4A in just a couple of clicks. No registration, no limits — and it’s 100% free.