Make big audio files small enough to email or upload. Audio Compressor re-encodes your audio to MP3 at a bitrate you choose, all in your browser with ffmpeg.wasm. Your file stays on your device the whole time — private and free.
Your data is processed entirely in your browser. Nothing is uploaded to any server.
Yes, all audio tools on Offline ToolHub are free.
No. Audio is processed locally in your browser with Web Audio and ffmpeg.wasm.
MP3, WAV, M4A, OGG and FLAC, depending on the tool.
No signup required.