Audio Compressor — free online tool
Audio Compressor runs entirely through temporary, in-memory processing: your file is uploaded, processed with FFmpeg, streamed back to you, and deleted immediately — nothing is stored permanently.
Drop a MP3, WAV, AAC file here, or click to choose one
Processed temporarily, deleted afterDrop a MP3, WAV, AAC file here, or click to choose one
MP3, WAV, AAC
How it works
How audio extraction works
Audio Compressor discards the video stream entirely and encodes just the audio track to MP3, so the resulting file only contains sound — no picture data, which keeps it small.
Choosing quality
Audio bitrate controls the tradeoff between file size and fidelity. Speech and podcasts stay clear at lower bitrates; music benefits from a higher bitrate to preserve detail.
Limitations
Uploads are capped in size for reliable processing, and only MP3, WAV, AAC files are accepted here. For very large files or advanced editing needs, dedicated desktop software may work better.
Frequently asked questions
Can I get a different audio format?
This tool page is set up for one target format; use the related MP3/WAV conversion tools if you need a different output.
Does the video file get modified?
No — your upload is read to extract the audio track and is deleted after processing. Nothing is changed or stored.