Any format your browser can decode, including MP4 (with AAC audio), WebM, MOV, and OGG. If decoding fails, the codec may not be supported by your browser — convert the file to MP4/AAC first.
No. Everything happens locally in your browser using the Web Audio API. Your video never leaves your device.
Yes. Use the Trim region controls to set a start and end time. Click 'Use current' while the video is playing to capture the current playback time. The orange marker on the timeline shows the current playhead.
WAV is a lossless format that preserves full audio quality and is supported everywhere. You can convert the WAV to MP3, AAC, or other compressed formats with a separate converter if needed.
Normalize finds the loudest peak in the extracted clip and scales the entire audio so that peak reaches -1 dB. This maximizes loudness without clipping. Useful for quiet recordings.
Yes. The 'Preserve stereo' checkbox is on by default. Disable it to mix multi-channel audio down to mono for a smaller file.
Use 'Original' to preserve the source rate. 48 kHz is the standard for video, 44.1 kHz for music. Lower rates (16 kHz, 8 kHz) produce smaller files and are fine for voice-only content.