How do I compress an M4A file?

Drop the M4A onto the compressor above, keep Balanced or pick another level, and click Compress. Download the smaller M4A when it's done; it usually takes a few seconds.

Does compressing M4A reduce quality?

A little, by design: M4A is a lossy format. Balanced is tuned to look the same for most uses; choose Light if you want to stay closer to the original.

How much smaller will my M4A get?

It depends on the original bitrate: 256 kbps music and high-quality voice memos shrink substantially, low-bitrate files much less.

Can I compress M4A to a specific size?

Yes. Set a target size in the compressor, or a percentage to reduce by, and the file is compressed to land at or just under it.

Is it safe to compress M4A files here?

Yes. M4A files are compressed inside your browser with WebAssembly and never uploaded to a server.

Is the M4A compressor free?

Yes. Compression is free with no watermark and no sign-up, within the same daily allowance as conversions.

M4A→smaller M4A→MP3 JPG→smaller M4A→WAV PNG→smaller M4A→FLAC MP4→smaller M4A→AAC MP3→smaller M4A→OGG PDF→smaller M4A→Opus WebP→smaller M4A→WMA HEIC→smaller M4A→AIFF DOCX→smaller M4A→AMR GIF→smaller M4A→M4B SVG→smaller M4A→AC3 MOV→smaller M4A→MP2 AVIF→smaller M4A→WEBA M4A→OGA WebM→smaller M4A→MKA M4A→WV MKV→smaller M4A→AU M4A→TTA XLSX→smaller PNG→JPG JPG→PNG EPUB→smaller PNG→WebP JPG→WebP AVI→smaller WebP→PNG WebP→JPG FLAC→smaller HEIC→PNG HEIC→JPG PPTX→smaller MP4→MP3 PNG→JPEG AAC→smaller JPG→JPEG JPEG→PNG ZIP→smaller JPEG→JPG PNG→PDF TIFF→smaller JPG→PDF PDF→PNG OGG→smaller PDF→JPG HEIC→WebP Opus→smaller MP4→WebP PDF→DOCX 7Z→smaller DOCX→PDF JPEG→WebP ODT→smaller WebP→JPEG PNG→GIF TAR.GZ→smaller JPG→GIF GIF→PNG ODS→smaller GIF→JPG MP4→MOV ODP→smaller MOV→MP4 WebP→PDF TAR.BZ2→smaller HEIC→JPEG WebP→GIF TAR.XZ→smaller 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 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 MP4→FLAC AVI→MP3 MOV→MKV MKV→MOV MOV→M4A DOCX→EPUB EPUB→DOCX CSV→DOCX PDF→TXT

Compress M4A

Make M4A files smaller without visible quality loss. Free, and your files never leave your browser.

Runs in your browser
Same format, smaller file
Batch & ZIP download

How to compress M4A

1
Add your M4A files
Drag and drop M4A files onto the compressor, paste them, or click to browse. You can add several at once.
2
Pick a level or a target
Balanced is selected and suits most files. Choose Light to stay closer to the original or Strong for the smallest file, or set a target size or a percentage to reduce by.
3
Compress
Click Compress. Your M4A files are processed right in your browser, usually in seconds.
4
Download
Download each smaller M4A, or everything at once as a ZIP.

What compression does to M4A

LossyIn your browser

Re-encodes AAC at a lower bitrate.

Light: A high bitrate: indistinguishable from the original for most listeners.
BalancedDefault: The default: a moderate bitrate that's fine for everyday listening.
Strong: Lowest bitrate: smallest file, best kept for speech and podcasts.

Need an exact size?

Set a target size in the compressor above, or a percentage to reduce by, and each M4A is compressed to land at or just under it.

M4A · MPEG-4 Audio

M4A is an audio-only MP4 file, usually containing AAC (or lossless ALAC). It's Apple Music's and Voice Memos' default format.

Type: Audio
Extension: .m4a
MIME: audio/mp4
Best for: iTunes/Apple Music libraries and voice memos

Lossy compression

All M4A conversions →

Compress other audio files

All audio files →

Compressing M4A: frequently asked questions

Free, private and in your browser

Smaller M4A files, in seconds.

No sign-up, no watermark, no upload. Drop a file and get it back lighter.

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Most conversions never leave your device
Cloud files deleted automatically
No watermarks