Free online WMA-to-M4B converter — upload a WMA file and download a M4B. Fast, private, no signup.
Drop your WMA file into the converter above — we auto-detect the real format from its bytes, convert it, and give you a M4B to download. No software to install.
Yes. Convert WMA to M4B 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.
Windows Media Audio. MPEG-4 audiobook (AAC, with chapter support).
Convert WMA to: MP3 · WAV · FLAC · M4A · AAC · AC3 · AIFF · M4R · OGG · OPUS
Convert to M4B from: AAC · AC3 · AIFF · AMR · APE · FLAC · M4A · M4R · MP3 · OGG