Channels & Format
Work with the technical shape of a file: convert between stereo and mono, swap or split channels, pan, widen, and change sample rate or bit depth.
- Stereo to MonoConvert stereo audio to mono by mixing both channels, or by keeping only the left or right one. Halves the file size of most voice recordings.
- Mono to StereoConvert mono to stereo so the sound plays from both speakers, with an optional balance control. Runs locally in your browser; nothing is uploaded.
- Swap Left and Right ChannelsSwap the left and right channels of a stereo file. Fixes recordings that were wired or panned the wrong way round. Runs in your browser.
- Split Stereo into Left and RightSplit a stereo file into separate mono files for the left and right channels. Extract only one side, or download both together as a ZIP.
- Channel MixerMix channels with a gain matrix: route left and right to any output at any level and invert polarity. A precise tool for odd channel problems.
- Pan Audio Left or RightPan audio to the left or right with equal-power or linear panning. See the result on the waveform before you export. Runs in your browser.
- Stereo WidthWiden or narrow the stereo image using mid/side processing, and check mono compatibility with a correlation readout before you export.
- Change Sample RateChange the sample rate of audio files, for example 44.1 kHz to 48 kHz, with a high-quality resampler. Presets from 8 kHz to 192 kHz. Runs locally.
- Change Bit DepthChange the bit depth of audio between 8, 16, 24-bit and 32-bit float, with TPDF dither when reducing. Export as WAV, AIFF or FLAC. Runs locally.