Choose your file
Add one supported file.
ON YOUR DEVICE
Compress audio
Save a smaller MP3 by choosing an audio bitrate.
Drop your file here
One file · Device-dependent capacity · Best for short clips
Files stay on your device
Three simple steps
Choose a bitrate
Try 128 kbps for a general-purpose MP3, or 64 kbps for a smaller speech recording.
Check and download
Preview the result and save your copy. Keep your original file.
Common questions
Which bitrate should I use?
Lower bitrates reduce size but can make music sound worse. Compare a short section through headphones before sharing.
Do my files leave my device?
Files are processed inside this browser. The site downloads its processing software, but your selected files are not sent to a conversion server.
Which files can I use?
MP3, WAV, FLAC, AAC, M4A, OGG, Opus, AIFF and WebM audio files are accepted. The codec inside a file must also be supported.
How large can a file be?
Select up to 100 images per batch, or one audio or video file per job. There is no fixed file-size or processing-time quota. Available memory, browser support and your device determine what can be processed. Large batches offer individual downloads to avoid an additional ZIP copy.