Which audio files can I compress?

MP3, M4A, AAC, OGG, Opus and FLAC. Each file comes back in its own format, just smaller.

Does compressing audio files reduce quality?

Lossy formats trade a little quality for a much smaller file, and Balanced is tuned to look or sound the same for most uses. FLAC is compressed losslessly.

Can I compress audio files to a specific size?

Yes, for MP3, M4A, AAC, OGG and Opus: set a target size or a percentage to reduce by; FLAC is lossless, so it can't be aimed at an exact size.

Are my audio files uploaded?

All audio files are compressed right in your browser with WebAssembly, so nothing is uploaded.

Can I compress several audio 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, mixing formats if you like, then download them individually or as one ZIP.

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

Compress Audio

Shrink songs, podcasts and voice memos by lowering the bitrate; FLAC stays lossless. Free, and your files never leave your browser.

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

6 audio formats

Need a specific size?

Set a target size in the compressor, say for an upload form or an email, or a percentage to reduce by. Each file is compressed to land at or just under it. FLAC is lossless, so it can't be aimed at a size; it's simply packed as tightly as possible.

How to compress audio files

1
Add your audio files
Drop audio files onto the compressor. You can mix MP3, M4A or AAC in one batch.
2
Choose a level or a target
Balanced suits most files. Pick Light or Strong, or set a target size or a percentage to reduce by.
3
Compress
Click Compress. Each file stays in its own format and comes back smaller.
4
Download
Download files one by one, or everything at once as a ZIP.

Compress other files

Compressing audio files: frequently asked questions

Free, private and in your browser

Lighter audio files, in seconds.

No sign-up, no watermark. Most files never leave your browser.

Compress audio files All compress tools

Most conversions never leave your device
Cloud files deleted automatically
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