How do I convert AU to AMR?

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

Is it safe to convert AU to AMR here?

Yes. Your file is sent over an encrypted connection to an isolated sandbox that's created for your job only, then both the original and the result are deleted automatically.

Is the AU to AMR converter free?

Yes. Cloud conversions like this one use credits, and you get free credits every day (3 without an account, 10 with a free account).

Will converting AU to AMR reduce quality?

AMR is a lossy format, but our defaults are tuned to be visually indistinguishable for most files. You can raise the quality under Options.

Can I convert multiple AU 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 AMR back to AU?

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

AMR→AU AU→MP3 MP3→AMR AU→WAV MP4→AMR AU→M4A WAV→AMR AU→FLAC MOV→AMR AU→AAC M4A→AMR AU→OGG AU→Opus AU→WMA AU→AIFF AU→M4B AU→AC3 AU→MP2 AU→WEBA AU→OGA AU→MKA AU→WV AU→TTA WebM→AMR FLAC→AMR MKV→AMR AAC→AMR AVI→AMR OGG→AMR WMV→AMR Opus→AMR WMA→AMR FLV→AMR M4V→AMR MPEG→AMR 3GP→AMR AIFF→AMR MPG→AMR TS→AMR M4B→AMR MTS→AMR VOB→AMR 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

AUAMR

Convert AU to AMR

Free and secure. AU files are converted in an isolated cloud sandbox and deleted automatically.

Isolated cloud sandbox
No watermark
Batch & ZIP download

How to convert AU to AMR

1
Add your AU files
Drag and drop AU files onto the converter, paste them, or click to browse. You can add several at once.
2
Choose AMR
AMR is already selected. Open Options if you want to change quality, size or metadata.
3
Convert
Click Convert. Files are processed in a secure cloud sandbox and are usually ready in seconds.
4
Download your AMR
Download each AMR file, or everything at once as a ZIP.

AU vs AMR

From

AU · Sun Audio

AU is a simple audio format introduced by Sun Microsystems, common on early Unix systems and Java.

Type: Audio
Extension: .au
MIME: audio/basic
Best for: legacy Unix and Java applications

Legacy format

All AU conversions →

AMR · Adaptive Multi-Rate

AMR is a speech codec used by mobile phones for voice recordings and calls.

Type: Audio
Extension: .amr
MIME: audio/amr
Best for: voice recordings from older phones

Lossy compressionLegacy format

All AMR conversions →

Need it the other way around? Convert AMR to AU.

Related conversions

AU to AMR: frequently asked questions

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Convert AU to AMR in seconds.

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Cloud files deleted automatically
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Convert AU to AMR

How to convert AU to AMR

Add your AU files

Choose AMR

Convert

Download your AMR