Free is enough for most one-off jobs. Pro raises the file and batch caps; Pro + Media unlocks GB-scale streaming and unlimited duration.
Larger files supported on Developer (5 GB CSV) and Enterprise (unlimited). All processing happens in your browser — files never reach a server.
Drop your audio file
Enter target size in MB
JAD picks the optimal bitrate and downloads the result
0 bytes uploaded. Audio File Compressor runs entirely in your browser using FFmpeg.wasm 8.1, RNNoise, and the Web Audio API. Your audio stays on your device at all times. No data is sent to any server — critical for sensitive interviews and confidential calls.
Bitrate × duration ≈ file size. JAD picks the closest standard bitrate for your target and verifies the output is within ±2% of the requested size.
Change bitrate of MP3, AAC, OGG, Opus files. CBR or VBR. Choose from 32-320 kbps.
Open toolAuto-compress any audio file under Discord's 25 MB free-tier upload cap. Picks the best bitrate for your duration.
Open toolAuto-compress any audio file under WhatsApp's 16 MB media cap. Voice-optimised bitrate selection.
Open tool