Tool StudioMake audio and music files smaller — and see exactly how much space you saved
Drop an audio file here, or click to browse
MP3, WAV, M4A, FLAC, OGG and more. Make the file smaller.
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Contact usAdd your audio file
Drop a song, recording or WAV on the page, or click to browse.
Choose how small
Pick a setting from Smallest to Higher quality, and the format to save as.
Mix to mono (optional)
For speech, tick the mono option to make the file about half the size again.
Compress and download
Press Compress audio, check the size you saved and download the smaller file.
Add an audio file - a song, a voice recording, a podcast episode, a WAV from a recording session - choose how small you want it and download a smaller copy. The result shows the size before and after, with the percentage you saved.
There are four settings, from Smallest (64 kbps) for voice recordings and lectures up to Higher quality (192 kbps) for music. Save the result as MP3 for the widest compatibility, or as M4A or OGG for files that are often a little smaller at the same quality. Tick the mono option to mix both channels into one at half the bitrate, which makes the file about half the size again and suits speech.
Compressing audio is how you get a recording under an email attachment limit, fit a message into a chat app's file size cap, make room on a phone, or turn a large WAV into something that is easy to share. A WAV file is uncompressed, so saving it as an MP3 typically makes it around a tenth of the size.
This tool makes the file itself smaller. It is not the studio effect that evens out the loud and quiet parts of a performance - if you want that, the Audio Volume Booster can even out the loudness.
Everything runs in your browser. Your music and recordings are never uploaded, so there is nothing to wait for and nothing to hand over to a server.
Add the file, choose a size setting and press Compress audio. The page shows the size before and after so you can see the saving, and you can listen to the result before you download it. If it is not small enough, choose a smaller setting or tick the mono option.
Making a file smaller works by storing less detail, so the sound is not identical to the original, but the difference can be very hard to hear. Choose Balanced (128 kbps) or Higher quality (192 kbps) for music, and use the smaller settings for speech. Listen to the result on the page before you download it.
Add the WAV and save it as MP3, M4A or OGG. A WAV file is uncompressed, so the compressed copy is typically a small fraction of its size - often around a tenth at 128 kbps.
Chat apps cap the size of files you can send, and WhatsApp's limit for audio sent as media has commonly been reported as 16 MB - check the current limit in the app. At 128 kbps about 17 minutes of audio fits in 16 MB, at 64 kbps about 35 minutes, and a mono voice recording at the Smallest setting about 70 minutes. Choose the setting that fits your recording and check the size shown on the page.
Gmail allows up to 25 MB of attachments per email. As a guide, a file is about 1 MB for every 65 seconds at 128 kbps, so 25 MB holds roughly 27 minutes of audio at that setting, and more at the smaller settings. Compress the file, check the size on the page and attach it.
For speech, interviews and lectures, Small (96 kbps) or Smallest (64 kbps) with the mono option sounds fine and is very small. For everyday music, Balanced (128 kbps) is a good middle. For music you care about, Higher quality (192 kbps) keeps more detail.
MP3, M4A and OGG make files small by storing less detail, so the compressed file is not identical to the original. At the higher settings the difference is hard to hear in normal listening, and at 64 to 96 kbps speech stays clear. Listen to the result on the page before you download it.
Stereo audio has a left and a right channel. Mono mixes them into one and saves it at half the bitrate you chose, which makes the file about half the size with little difference in how a voice sounds. It suits voice recordings, lectures, calls and podcasts. Music usually sounds better in stereo.
No. A zip file packs files together without changing the sound, and MP3 and M4A files are already compressed, so zipping them hardly makes them smaller. Compressing audio re-saves the sound at a lower bitrate, which is what actually reduces the size.
At the same quality setting, M4A and OGG are often a little smaller than MP3. MP3 plays on the widest range of devices and apps, so it is the safe default for sharing.
Yes. MP3 is a compressed format, which is why an MP3 is much smaller than the same recording as a WAV. A high-bitrate MP3 can still be made smaller by saving it again at a lower bitrate.
Add the song, choose Balanced (128 kbps) for a good middle between size and sound, and save it as MP3 or M4A. A WAV or FLAC copy of a song will get much smaller; an MP3 that is already at a low bitrate will not.
In a studio, compression means evening out the difference between loud and quiet parts. This tool makes the file smaller. If you want a quiet recording louder or evened out, the Audio Volume Booster has an Even out the loudness option for that.
No. The compression runs inside your browser, on your own device, so your music and recordings are never sent to a server.
Yes - no account, no premium tier and no daily limit.
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