Compress Audio Online
Reduce the file size of your audio files directly in your browser.
How to compress an audio in 3 steps
Choose an MP3, WAV, OGG, M4A, AAC, OGA, FLAC, ALAC, AIFF, OPUS, M4B or AC3 audio file.
Select the quality.
Click compress and download your optimized audio.
Supported format descriptions
MP3 — MP3 is the best-known compressed audio format. It trades a little quality for much smaller files, making it perfect for music and audiobooks.
WAV — WAV is a lossless audio format developed by Microsoft and IBM. It delivers faithful quality but very large files, and is often used in production.
OGG — OGG is an open, patent-free audio and video container, usually paired with the Vorbis codec. It offers high quality and good compression.
M4A — M4A is a compressed audio container based on MP4, usually using the AAC codec. It is very common on Apple devices and mobile phones.
AAC — AAC (Advanced Audio Coding) is a lossy audio codec that is more efficient than MP3 at the same bitrate. It is the standard for MP4 video and modern devices.
OGA — OGA is the audio-only container within the Ogg family. It is patent-free and used with Vorbis or Opus codecs.
FLAC — FLAC is an open-source lossless audio format that compresses without losing quality, roughly halving file size. Ideal for audio archives.
ALAC — ALAC (Apple Lossless) is Apple's lossless audio codec. It compresses without loss and is fully compatible with Apple devices.
AIFF — AIFF is Apple's lossless audio format, similar to WAV. It delivers lossless quality with large files and is used in professional settings.
OPUS — OPUS is a modern, open and royalty-free audio codec. It delivers excellent quality even at low bitrates, making it ideal for streaming, voice and podcasts.
M4B — M4B is the MP4-based container used for audiobooks. It supports chapters and bookmarks, using the AAC codec just like M4A.
AC3 — AC3 (Dolby Digital) is the standard audio codec for DVD, Blu-ray and home theater. It supports up to 5.1 channels of surround sound.
Frequently Asked Questions
What is audio compression?
Audio compression reduces the file size of an audio file while trying to preserve audio quality. It works by encoding data more efficiently.
Are my audio files uploaded?
No. This tool processes audio files directly in your browser. Your audio files are never sent to a server.
Which audio formats are supported?
The tool supports common audio formats such as MP3, WAV, OGG, M4A, AAC, OGA, FLAC, ALAC, AIFF, OPUS, M4B and AC3 and compresses them while keeping the original format, all in your browser.
Does compression reduce audio quality?
The quality slider lets you balance size and quality: higher values keep more detail, lower values shrink the file more.
Is it really free and unlimited?
Yes, the tool is completely free and you can compress as many audio files as you want, with no limits.
Does it work on mobile too?
Yes, it works on any modern device, including smartphones, tablets and desktop computers.
Can I choose the output format?
The compressed audio keeps the same format (extension) as the original file: compression does not change the format.
About the audio compressor
Compress MP3, WAV, OGG, M4A, AAC, OGA, FLAC, ALAC, AIFF, OPUS, M4B and AC3 audio files online for free. Reduce the file size of your audio recordings while keeping good quality. Everything happens in your browser: audio files are never uploaded to a server, and you need no downloads or sign-up to get started.
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