Compress MP3 to an exact size.
Pick a target — 3 MB to 20 MB, or type your own — and we tune the bitrate to land your audio near it. Uploaded privately and deleted within an hour. No watermark, no signup.
On-target
Auto-tunes to your limit
Quality-aware
Stays usable
Private
Deleted within an hour
Target size
How it works
- 01
Pick a target size
Choose a preset (3 MB to 20 MB) or type any size in MB — whatever your email, form or upload needs.
- 02
Add your audio
Drop in an MP3, M4A, WAV or other audio file. It's uploaded privately over TLS and deleted within an hour.
- 03
Download it
We pick the bitrate that lands the file near your target, re-encode it, and hand it back — never bigger than the original.
Common targets: 5 MB · 10 MB · just smaller.
Common questions
What sizes can I target?+
Any size in MB — use the presets (3/5/10/20 MB) for common email and upload limits, or type your own. We auto-tune the bitrate to land near it while keeping the audio clear.
Will it still sound okay?+
We tune the bitrate to the audio's length, so short clips stay crisp. Spoken-word audio compresses especially well; long music tracks share the budget across more minutes.
Is my audio uploaded anywhere?+
It's uploaded over an encrypted connection, compressed on our server, and both the upload and the result are deleted within an hour. No account, no watermark.
What if it can't hit the target?+
We give you the smallest listenable version and tell you it's just over — for a long track, trim it or pick a larger target.
Which formats work?+
MP3, M4A, AAC, WAV, OGG, FLAC and most common audio files. MP3 comes back as MP3.