WAV channel converter

PCM16 WAV only: ≤8MiB, 1–2 channels, 8000–48000Hz, ≤120s, ≤128 chunks; output≤16MiB, timeout10s. Times use ASCII digits and a dot, up to6 decimals. Start/end round to the nearest frame, ties upward; the end frame is excluded. Mono duplicates unchanged to both channels. Stereo uses (L+R)/2, rounded to the nearest integer with ties away from zero and clipped to PCM16. No resampling, normalization or dither. Output removes metadata chunks. Clear/cancel discards buffers and download URLs. No upload, playback or server fallback.

Input and results stay in this tab's memory. No upload, browser storage, analytics, logs, URL or history data. Clear, mode change or leaving removes them. Only language/theme/consent-choice preferences may be saved.