MP3 & Audio Compressor
Make MP3 and other audio files smaller — for email, storage, or upload limits. Choose a target bitrate, compress in seconds, and keep your tags and artwork. Free, no account, no watermark.
Drag & drop an audio file here, or browse
Need a smaller file? Upload your MP3 or audio file above and pick a target bitrate — a lower bitrate makes a smaller file. Files up to 30MB are processed directly in your browser session; nothing is stored after your download.
How Audio Compression Actually Works
The simplest, most reliable way to make an audio file smaller is to lower its bitrate — the amount of data stored per second. A 3-minute song at 320kbps is about 7 MB; the same song re-encoded to 128kbps is about 2.9 MB, and at 96kbps roughly 2.2 MB. You choose the trade-off: smaller file, or higher fidelity.
There's an honest limit worth stating up front. Re-encoding a lossy file (like an MP3) to a lower bitrate is a one-way trade — you can't later restore the detail you dropped. "Compress without losing quality" is really "compress with the least audible quality loss for the size you need." Our encoder is tuned to do exactly that.
Pick the Right Target Bitrate
| Target | ~Size (3-min) | Sounds like | Good for |
|---|---|---|---|
| 192kbps | ~4.3 MB | Transparent to most ears | Everyday listening on a smaller file |
| 128kbps | ~2.9 MB | Slightly compressed on good headphones | Email attachments, podcasts, voice |
| 96kbps | ~2.2 MB | Noticeably compressed, still clear | Voice memos, spoken word, tight limits |
| 64kbps | ~1.5 MB | Clearly compressed | Speech-only, maximum shrink |
For music you want to keep, 192kbps is the sweet spot for a smaller file that still sounds good — it's selected by default above. For spoken-word audio (podcasts, lectures, voice notes), you can go lower without hurting intelligibility.
When to Compress an MP3
- Email limits — most inboxes cap attachments around 20–25 MB. Compressing a long recording gets it under the line.
- Upload requirements — some forums, LMS platforms, and voicemail/greeting systems enforce a max file size or bitrate.
- Storage — fitting far more songs on an old MP3 player, phone, or USB stick.
- Faster sharing — smaller files upload and download quicker over slow connections.
Your Tags and Artwork Stay Put
Compressing here doesn't strip your metadata. Track title, artist, album, genre, and embedded cover art carry through to the smaller file, so your library stays organized.
Formats You Can Upload
Upload MP3, and also M4A/AAC, WAV, FLAC, or OGG — we'll compress to a smaller MP3. Converting a large WAV or FLAC down to a 192kbps MP3 is one of the biggest size wins available: a 30 MB WAV can become a ~4 MB MP3.
Want Higher Quality Instead of Smaller?
If your goal is the best MP3 rather than the smallest, you're on the wrong page — head to our 320kbps converter. Compression is about trading quality for size; 320kbps is about keeping as much quality as MP3 allows.
Compress MP3 and audio files free — choose your size, keep your tags, no account.
Want maximum quality? Convert at 320kbps → What is 320kbps? →Frequently Asked Questions
How do I make an MP3 smaller?
Lower its bitrate. Upload the file, choose a target (e.g. 192 or 128kbps), and download the smaller version.
Can I compress without losing quality?
Not entirely — reducing bitrate is a quality-for-size trade. Our encoder minimizes audible loss for the size you pick; 192kbps is close to transparent for most listeners.
Will compressing remove my album art and tags?
No. Title, artist, album, genre, and cover art are preserved in the compressed file.
What file types can I upload?
MP3, M4A/AAC, WAV, FLAC, and OGG. Large WAV/FLAC files shrink the most.
Is there a file-size or count limit?
It's free with no account; the direct converter accepts files up to 30MB.
What bitrate should I choose?
192kbps for music you want to keep smaller, 128kbps for email/podcasts, or lower for speech-only audio.