Extract Left Channel
Save the left channel of a stereo file as mono.
How to use Extract Left Channel
Save the left channel of a stereo file as mono.
Use a short audio clip and check channel information and sound quality after processing.
- Open Extract Left Channel on Tools4U.
- Upload the supported audio file.
- Adjust any settings, select Process Audio, then wait.
- Preview and download your output within 12 minutes.
Frequently asked questions
Is Extract Left Channel free?
Yes. Signed-in verified users can process short audio, and Premium members do not see advertisements.
What are the upload limits?
Up to 24 MB per file, 48 MB combined, 180 seconds per track, and 10 jobs per hour. Some effects have shorter input limits.
Where is audio processed?
The audio is processed by an isolated private FFmpeg worker. Outputs are temporary, but you should still avoid uploading confidential material without permission.