MP3 Compressor
Compress an MP3 file online using the available settings. Preview or check the output quality before replacing your original audio.
MP3 Compressor
Reduce your MP3 file size while maintaining good quality
Click to upload or drag and drop your MP3 file
Maximum file size: 25MB
Original file:
Original size:
Compressed size:
Reduction:
Select the audio and bitrate
Upload an MP3 within the displayed size limit. Choose the available bitrate setting and select Compress MP3. When processing finishes, compare the reported file sizes and download the result. Keep the original recording.
Listen before using the file
Check a spoken passage, a quiet section, and any music or background sound. A lower bitrate may make a file smaller while introducing audible changes. A size reduction is not a measure of acceptable sound quality for your particular project.
Test a short example
Try a voice recording that you can listen to from start to finish. Compare the original and output with the same headphones and volume setting. If consonants become unclear or background sounds become distracting, use a different setting or source file.
Check the destination
Confirm the format and bitrate requirements of the service receiving the audio. Recompressing an already compressed MP3 cannot restore detail lost in the first encoding. File duration, starting bitrate, and the selected setting all affect the resulting size.