How do I convert M4B to AIFF?

Drop your M4B file onto the converter above, make sure AIFF is selected, and click Convert. When it's done, download the AIFF file — it usually takes a few seconds.

Is it safe to convert M4B to AIFF here?

Yes. M4B to AIFF conversion happens entirely inside your browser using WebAssembly, so your file is never uploaded to any server.

Is the M4B to AIFF converter free?

Yes — free with no watermark. Signed-out visitors can convert 25 files a day, and a free account raises that to 250.

Will converting M4B to AIFF reduce quality?

No — AIFF preserves the content of your M4B file as faithfully as the format allows.

Can I convert multiple M4B files at once?

Yes. Add up to 5 files at a time without an account, 10 with a free account and up to 500 on paid plans, then download them individually or as a single ZIP.

Can I convert AIFF back to M4B?

Yes — use our AIFF to M4B converter. Note that converting back and forth between formats can't recover detail lost to lossy compression.

AIFF→M4B M4B→MP3 MP3→AIFF M4B→WAV MP4→AIFF M4B→M4A WAV→AIFF M4B→FLAC MOV→AIFF M4B→AAC M4A→AIFF M4B→OGG M4B→Opus M4B→WMA M4B→AMR M4B→AC3 M4B→MP2 M4B→WEBA M4B→OGA M4B→MKA M4B→WV M4B→AU M4B→TTA WebM→AIFF FLAC→AIFF MKV→AIFF AAC→AIFF AVI→AIFF OGG→AIFF WMV→AIFF Opus→AIFF WMA→AIFF FLV→AIFF M4V→AIFF MPEG→AIFF 3GP→AIFF AMR→AIFF MPG→AIFF TS→AIFF MTS→AIFF VOB→AIFF M2TS→AIFF PNG→JPG JPG→PNG PNG→WebP JPG→WebP WebP→PNG WebP→JPG HEIC→PNG HEIC→JPG MP4→MP3 PNG→JPEG JPG→JPEG JPEG→PNG JPEG→JPG PNG→PDF JPG→PDF PDF→PNG PDF→JPG HEIC→WebP MP4→WebP PDF→DOCX DOCX→PDF JPEG→WebP WebP→JPEG PNG→GIF JPG→GIF GIF→PNG GIF→JPG MP4→MOV MOV→MP4 WebP→PDF HEIC→JPEG WebP→GIF GIF→WebP HEIC→PDF MP3→WAV WAV→MP3 JPEG→PDF PDF→JPEG SVG→PNG SVG→JPG HEIC→GIF MOV→MP3 MP4→GIF GIF→MP4 JPEG→GIF GIF→JPEG PNG→AVIF JPG→AVIF AVIF→PNG AVIF→JPG MP3→M4A M4A→MP3 GIF→PDF SVG→PDF PNG→SVG JPG→SVG PDF→SVG SVG→WebP MOV→WebP MP4→WAV MP4→WebM WebM→MP4 WebP→AVIF AVIF→WebP WebP→SVG SVG→JPEG MP4→MKV MKV→MP4 HEIC→AVIF MP4→M4A JPEG→AVIF AVIF→JPEG JPEG→SVG MOV→GIF GIF→MOV WebM→MP3 AVIF→PDF MP3→FLAC FLAC→MP3 MP4→AVI AVI→MP4 MKV→MP3 GIF→AVIF AVIF→GIF SVG→GIF GIF→SVG WebM→WebP MOV→WAV XLSX→PDF CSV→PDF EPUB→PDF PDF→EPUB MOV→WebM WebM→MOV MKV→WebP PNG→ICO JPG→ICO ICO→PNG ICO→JPG MP3→AAC WAV→M4A AAC→MP3 M4A→WAV MP4→FLAC AVI→MP3 MOV→MKV MKV→MOV MOV→M4A DOCX→EPUB EPUB→DOCX CSV→DOCX PDF→TXT DOC→PDF TXT→PDF WebP→ICO ICO→WebP PPTX→PDF AVI→WebP

M4BAIFF

Convert M4B to AIFF

Free, fast and private. Your M4B files are converted right in your browser — nothing is uploaded.

Runs in your browser
No watermark
Batch & ZIP download

How to convert M4B to AIFF

1
Add your M4B files
Drag and drop M4B files onto the converter, paste them, or click to browse. You can add several at once.
2
Choose AIFF
AIFF is already selected. Open Options if you want to change quality, size or metadata.
3
Convert
Click Convert. Your files are converted right in your browser in seconds.
4
Download your AIFF
Download each AIFF file, or everything at once as a ZIP.

M4B vs AIFF

From

M4B · MPEG-4 Audiobook

M4B is an MP4 audio file flagged as an audiobook, supporting chapters and resume position.

Type: Audio
Extension: .m4b
MIME: audio/mp4
Best for: audiobooks on Apple Books and other players

Lossy compression

All M4B conversions →

AIFF · Audio Interchange File Format

AIFF is Apple's uncompressed audio format, the Mac equivalent of WAV.

Type: Audio
Extension: .aiff .aif .aifc
MIME: audio/aiff
Best for: professional audio on macOS

Lossless

All AIFF conversions →

Need it the other way around? Convert AIFF to M4B.

M4B to AIFF: frequently asked questions

Free, private and in your browser