Convert audio to MP3 Choose settings for your file
Convert audio your browser can decode to MP3. Choose bitrate, channels and sample rate, then listen to the original and result. File size and sound quality depend on the source and settings.
Drag & Drop your audio file here or click to browse
MP3, WAV and other formats your browser can decode. Format support varies by browser.
Why AudioCompressor?
Free audio to MP3 conversion in your browser
Audio processing in your browser
The app processes selected audio in browser memory without uploading it to an app server.
Presets and custom settings
Choose 64, 128 or 192kbps presets, or select custom settings.
Bitrate and sample rate choices
Choose a bitrate supported by the sample rate. The maximum at 22.05kHz is 160kbps.
Mono and stereo output
Choose output channels. Mono does not halve the file size at the same MP3 bitrate.
Peak adjustment
Applies one gain value to the whole file. This does not equalize sections or normalize to a LUFS target.
Playback and MP3 download
Play the original and converted audio, then save the generated MP3.
Simple 3-Step Workflow
Choose one audio file or use the built-in sample.
Select Audio File
Choose one audio file or use the built-in sample.
Choose Preset
Select a preset or choose bitrate, channels and sample rate.
Download MP3
After conversion, check the result size and download the MP3.
Select Compression Preset
Convert to 128kbps stereo MP3. An already small source file may become larger.
| Select Compression Preset | Bitrate (kbps) | Channels | Sample Rate |
|---|---|---|---|
| 64 kbps · Mono 64kbps mono for voice recordings. Music detail may be reduced. | 64 kbps | Mono | 22.05 kHz |
| 128 kbps · Stereo Convert to 128kbps stereo MP3. An already small source file may become larger. | 128 kbps | Stereo | 44.1 kHz |
| 192 kbps · Stereo 192kbps stereo. Produces larger files than lower bitrates. | 192 kbps | Stereo | 44.1 kHz |
Frequently Asked Questions
Everything you need to know about local audio compression