Free online M4B-to-AAC converter — upload a M4B file and download a AAC. Fast, private, no signup.
Drop your M4B file into the converter above — we auto-detect the real format from its bytes, convert it, and give you a AAC to download. No software to install.
Yes. Convert M4B to AAC for free right in your browser, with no account needed to get started.
Your file is transferred over an encrypted connection and anonymous uploads are temporary. You can also view and strip metadata (location, device, author) before you download.
MPEG-4 audiobook (AAC, with chapter support). Advanced Audio Coding (lossy, MP3 successor).
Convert M4B to: MP3 · WAV · FLAC · M4A · AC3 · AIFF · M4R · OGG · OPUS · WV
Convert to AAC from: AC3 · AIFF · AMR · APE · FLAC · M4A · M4R · MP3 · OGG · OPUS