Swap the left and right channel of a stereo file - for tracks recorded the wrong way round or side-reversed mixes, locally and without upload.
Running locally on your device ...
Running locally on your device ...
0%
Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
A microphone pair wired the wrong way, a side-reversed interview mix (question right instead of left) or an instrument on the wrong side: sometimes left and right simply need to switch places. This tool swaps the two stereo channels sample by sample - nothing else changes.
The swap is lossless at the PCM level: nothing is mixed, filtered or changed in volume - the left channel becomes the right one one-to-one and vice versa. Only true stereo files are accepted; mono or multi-channel input gets a clear message instead of a guessed result.
Like every gottrix tool, the swap runs fully locally in the browser: decode, exchange, re-encode - no upload.
| Input formats | MP3, WAV, M4A, AAC, OGG, OPUS, FLAC |
|---|---|
| Auto-conversion | MP4 |
| Output formats | WAV, M4A |
| Batch processing | No |
| Processing | Locally in your browser (WebCodecs) |
| File upload | None |
Limitations: Stereo files only (exactly 2 channels) - mono and multi-channel (5.1 etc.) are refused with a clear message. Honest per-device length cap (desktop about 20 minutes, tablet 15, phone 10; more with plenty of memory). Compressed inputs need WebCodecs decoding; output is WAV or M4A (re-encoded, lossless for WAV).
No, everything stays local in the browser.
Not at the PCM level - samples are only exchanged. M4A output adds an AAC encode; WAV stays lossless.
Mono has nothing to swap, and with 5.1 it would be unclear which channels are meant - an honest refusal beats a guessed result.
Test with headphones: what should sound left (the interviewer, a particular instrument) should sit in the left ear. If not - swap.