Make an MP3 smaller
Pick a lower bitrate and the file shrinks accordingly. 320 kbps is near-transparent, 128 is the classic size, 96 fits almost any inbox.
🔒 Your file never leaves your device.
How it works
How it works
- 1
Add what goes in
Drop your MP3, M4A, WAV, OGG and 4 more formats here, or pick it from your device.
- 2
Start it
Set the bitrate, then start. Everything runs in this browser — no upload, no queue, no account.
- 3
Take the result
The MP3 is ready the moment the run finishes. Save it straight to your device.
When you need this
- A recorded sermon is too large to upload to the parish website.
- An audiobook chapter should take less space on an old MP3 player.
Supported formats
Good to know
Frequently asked questions
What files can I use here?
Reads MP3, M4A, WAV, OGG and 4 more formats. As many files at once as you like.
What do I get back?
You get MP3.
Does the file lose quality?
The sound is decoded and encoded again. At high bitrates that is inaudible; low ones thin out cymbals and sibilants first.
Which bitrate should I pick?
192 kbps sounds transparent to most ears, 128 kbps is the classic size for sharing, and 96 kbps still fits almost any inbox. Going higher than the original never adds quality — it only adds bytes.
Does the length change?
No. Converting and compressing keep the full length; only trimming shortens the file, and there you set the start and end yourself.
Are my files uploaded to a server?
No. The whole job runs inside your browser, on your own device. Your file never travels over the network, so there is nothing for us to store, read or lose.
Private by design
Your files stay on your device
Your file never leaves your device.
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