Compress MP3 online
Shrink an MP3 file by lowering its bitrate — useful for saving storage space or making an audio recording easier to send.
Accepted source formats
How it works
Drop your MP3 file: its original bitrate is detected.
Pick a lower target bitrate (e.g. 128 kbps) based on the quality you need.
Download the compressed MP3, smaller but with reduced audio fidelity accordingly.
Common mistakes
- Using a source file of poor quality.
- Publishing without checking the final result.
- Confusing file size, dimensions and quality.
- Overwriting the original file without keeping a copy.
Pro tips
- Always keep an original version.
- Test several settings before downloading.
- Use WebP for the web when possible.
- Choose descriptive file names for SEO.
Privacy guaranteed
Your files are processed locally in your browser and are never uploaded to our servers.
Adapt your files to your needs
Prepare your files for the web, emails, professional documents or online sharing. Processing happens directly in your browser, fully private and with nothing to install.
Practical formats for everyday work
Choose the formats best suited to your needs: publishing, archiving, printing, collaboration or quick sharing. Processing happens directly in your browser, fully private and with nothing to install.
Free tool, no signup required
Use the tool for free, with no account, no email required and no unnecessary steps. Processing happens directly in your browser, fully private and with nothing to install.
Secure, private processing
Your files stay on your device and are processed locally. No file is ever sent to a remote server. Processing happens directly in your browser, fully private and with nothing to install.
Save time on all your files
Keep a simple workflow: add your files, choose your settings, then download the final result. Processing happens directly in your browser, fully private and with nothing to install.
Discover all our tools
Convert, compress, merge and edit your files in a few clicks.
Complementary tools
Guides and tutorials
Learn how to use our tools with our detailed guides.
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