Compress Audio: shrink files with a bitrate or an exact target size

Drop up to 10 audio files and compress them in your browser. Pick MP3, Opus, AAC, OGG, or lossless FLAC, choose a bitrate, or enter the file size you need and let BlowFix calculate the bitrate for you. See the exact original and compressed size for every file, preview each result, and download individually or as one ZIP. Everything runs on your device: your audio never leaves your browser. MP3 outputs are stamped with blowfix.com metadata.