Why this tool is useful
Make a smaller, browser-friendly copy of a voice note, podcast excerpt or music preview while choosing the intended quality budget.
Local File Tools · runs locally
Private Opus Audio Compressor
Compress a short browser-decodable audio file to Opus in a WebM container at an explicit target bitrate without uploading the recording.
Ready. Your working data stays in this browser.
Files and capture streams stay on this device. Processing uses browser APIs only; nothing is uploaded to YTSave, the media API or a proxy.
How it works
Web Audio decodes the source on this device and feeds its samples to the browser's Opus MediaRecorder at the selected bitrate.
Practical example
Compress a short WAV recording to 64 kbps Opus, compare the source and output sizes, then download the generated WebM audio file.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.