Compress MP3 Online
Reduce MP3 file size by lowering the bitrate to 64, 96, 128, or 192 kbps. Perfect for emailing voice notes, shrinking podcast archives, fitting more music on a USB drive, or speeding up uploads. Files are processed on our server and auto-deleted after conversion.
Drop your MP3 file here
or click to select file
Supports MP3 files - Max 100MB (Pro: 500MB)
Selected File
MP3 Quality Settings
Converting...
Compressing your MP3 file. Please wait.
Uploading...
Conversion Complete!
Your MP3 file is ready to download
Original Size
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New Size
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Format
MP3
Duration
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Need to Convert to MP3 First?
This tool only compresses MP3 files. If your file is in another format, convert it to MP3 first using one of these tools.
Frequently Asked Questions
How does MP3 compression work? expand_more
MP3 compression reduces file size by lowering the bitrate — the amount of audio data stored per second. A 192 kbps MP3 takes roughly half the space of a 320 kbps MP3. Lowering the bitrate is fast and keeps the file in standard MP3 format that any player can read.
Will compressing my MP3 reduce audio quality? expand_more
Yes — lower bitrates discard more audio detail. For music, 192 kbps is near-CD quality; 128 kbps is fine for casual listening; 96 and 64 kbps are best for spoken word (podcasts, voice memos) where the bandwidth saving outweighs the loss in fidelity.
What bitrate should I choose to compress my MP3? expand_more
192 kbps for music when you want to keep quality high and just shave some size. 128 kbps is a balanced default. Pick 96 or 64 kbps for podcasts, lectures, and voice notes — the spoken word stays intelligible while the file becomes 3-5x smaller, perfect for emailing or USB drives.
Can I compress files other than MP3? expand_more
This tool only accepts MP3 input — the output is also MP3 with reduced bitrate. To shrink a different audio format, first convert it to MP3 using our audio converter, then compress the resulting MP3 here.
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