Which channel operations are supported?
You can combine stereo into mono, duplicate mono into two channels, extract the left or right channel, swap channels, adjust balance, or invert the polarity of the left, right, or both channels.
Convert stereo to mono or mono to stereo, extract, swap, or balance channels, and check or invert stereo polarity.
Drop audio here, or click to select
Audio and video files are processed locally in your browser and are not uploaded.
This flips waveform polarity; it does not play the audio backward. To repair left/right cancellation, invert one channel, not both.
An audio channel converter changes how left and right signals are routed. It can create a mono mix, duplicate mono into a stereo pair, isolate or exchange channels, shift the balance, or invert the polarity of selected channels.
Stereo to Mono combines both sides into one channel for speech, accessibility, smaller files, and playback systems that do not need stereo. Mono to Stereo duplicates one channel into a matching stereo pair for compatibility. Left and Right extraction are useful when each side contains a different microphone, language, instrument, or test signal.
Swap Channels corrects recordings with reversed placement. Balance keeps a stereo output but lowers one side relative to the other. Invert Polarity flips sample signs on the selected channel; the full-file check can identify closely matching left and right signals with opposite polarity.
The conversion is performed locally in the browser. Preview the processed result to confirm the routing before downloading it in the original or another supported audio format.
You can combine stereo into mono, duplicate mono into two channels, extract the left or right channel, swap channels, adjust balance, or invert the polarity of the left, right, or both channels.
No. Mono to Stereo creates two matching channels for compatibility, but it does not create new spatial information. Audible width requires different processing on the two channels.
Left and right signals with opposite polarity can partially cancel when they are combined. Use the polarity check when a stereo file becomes unexpectedly quiet in mono, then preview any correction before downloading.
Related tools: Audio Channel Converter · Stereo to Mono · Mono to Stereo · Extract Left · Extract Right · Swap Channels · Invert Polarity