Compress MP3 to 5 MB.
Need an audio file under 5 MB for email or an upload form? Drop it in and we tune the bitrate to hit the target, uploaded privately and deleted after 1 hour. No watermark, no signup.
On-target
Auto-tunes the bitrate
Clear
Keeps it listenable
Private
Deleted after 1 hour
How it works
- 01
Add your audio
Drop in an MP3, M4A, WAV or other audio file. It's uploaded privately over TLS and deleted after 1 hour.
- 02
We aim for 5 MB
We read the length and pick the bitrate that lands the file near 5 MB, re-encoding it to keep it as clear as the budget allows.
- 03
Download & send
Grab the compressed audio, ready to email or upload anywhere with a 5 MB cap.
Other targets: 5 MB · 10 MB · just make it smaller.
What fits in 5 MB of MP3
5 MB is 5,242,880 bytes, 41,943 kilobits, spent on one steady bitrate from 32 to 320 kbps.
| Bitrate | Longest recording |
|---|---|
| 320 kbps | 2 min 11 s |
| 256 kbps | 2 min 43 s |
| 192 kbps | 3 min 38 s |
| 160 kbps | 4 min 22 s |
| 128 kbps | 5 min 27 s |
| 96 kbps | 7 min 16 s |
| 64 kbps | 10 min 55 s |
| 48 kbps | 14 min 33 s |
| 32 kbps | 21 min 50 s |
| Recording | Bitrate | File size |
|---|---|---|
| 1 min | 320 kbps | 2.29 MB, under |
| 3 min | 233 kbps | 5.00 MB |
| 5 min | 139 kbps | 4.97 MB |
| 10 min | 69 kbps | 4.94 MB |
| 20 min | 34 kbps | 4.86 MB |
| 30 min | 32 kbps | 6.87 MB, over |
- Under 2 min 11 s: 320 kbps, smaller than 5 MB.
- Over 21 min 50 s: cut it into parts of 10 min 55 s for 64 kbps each.
Common questions
Why 5 MB?+
5 MB is a common upload cap on forms, messaging apps and email threads. For a voice note, lecture or podcast clip, 5 MB is plenty and gets you under tight limits.
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 have to share 5 MB 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 after 1 hour. No account, no watermark.
What if it can't fit 5 MB?+
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 like 10 MB.
Which formats work?+
MP3, M4A, AAC, WAV, OGG, FLAC and most common audio files. MP3 comes back as MP3.
More compression tools
Need more than a conversion?
Send your audio or video to TranscriptAI to generate a transcript, summary, structured notes, flashcards, quiz questions or action items: automatically.