Why this tool is useful
Separate an intro from a recording or divide a voice note at a known timestamp while keeping the entire source on the current device.
Local File Tools · runs locally
Private Browser Audio Splitter
Split one browser-decodable audio file at an exact time and download two PCM WAV parts in a ZIP archive 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 selected file, the browser validates the requested timestamp and decoded-sample bound, writes two PCM WAV files and packages them with pinned JSZip.
Practical example
Choose a ten-second recording, split it at 4.5 seconds, inspect both reported durations and download audio-parts.zip.
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.