freeaudio.tools
MP3 Compressor
Make MP3 and audio files smaller, free. One file or a whole batch.
Your file. Your browser. Nothing uploaded.
mp3, wav, m4a, ogg, flac, or a video (mp4, webm, mov)
Questions
Is this MP3 compressor free?
Yes, 100% free. No sign up, no watermark and no limits.
Do my files get uploaded?
No. Your files never leave your device. The compression happens right in your browser.
How do I make an MP3 smaller?
Drop your files in the box, pick a lower bitrate (64 kbps is a good start) and click Convert all. Each file shows its size before and after.
Which bitrate should I pick?
96 or 128 kbps for music that still sounds good. 64 kbps for podcasts and voice. 32 or 48 kbps for the smallest possible files, like long voice notes.
How much smaller will my file get?
A 320 kbps MP3 compressed to 64 kbps is about 5 times smaller. A 4 minute song at 64 kbps is about 2 MB.
Can I get under the Discord or email size limit?
Usually, yes. Drop the bitrate until the file fits. The size shows after each file converts.
No sound on my iPhone?
Turn off silent mode (the switch or Action button on the side), turn up the volume, and press Play again. Older iPhones mute web audio in silent mode.
Learn more about compressing MP3 files
Compress MP3 files online, free
This free MP3 compressor makes audio files smaller by lowering the bitrate, right in your browser. It works on MP3, WAV, M4A and more, and shows how much smaller each file got.
How to reduce MP3 file size
- Drop your audio files in the box above.
- Pick a bitrate: 128, 96, 64, 48 or 32 kbps.
- Click Convert all.
- Check the before and after size next to each file.
Make audio files small enough for email and Discord
Big audio files often go over email and chat app limits. Compressing to 64 or 96 kbps usually makes them small enough to send, while still sounding fine for voice and casual listening.
Compress podcasts and voice recordings
Speech sounds clear even at low bitrates. Recordings, lectures and podcasts can go down to 48 or 64 kbps and shrink a lot.
We hope you enjoy using our free MP3 compressor! Consider donating to keep the site running here: Donate