Why convert Stereo to Mono?

Mono files are smaller, playback consistently across mono speakers, and prevent phase cancellation issues on broadcasting platforms.

How do I fix audio only playing in the left ear?

Upload your file and select 'Left Only' mode. The tool will clone the left track to both ears.

Is this converter free?

Yes! YupVox Stereo to Mono Converter is 100% free and runs privately in your browser.

Gratis · No Installation

Stereo to Mono & Mono to Stereo Audio Converter

Merge stereo channels into mono, extract left or right channel, and fix one-sided audio recordings in seconds.

Click to upload or drag & drop audio file

Supports MP3, WAV, M4A, OGG, AAC (100% private in browser)

Key Features

4 Matrix Conversion Modes

Mix L+R to Mono, Extract Left Track, Extract Right Track, or Mono to Dual Stereo.

Fix One-Sided Microphones

Instantly rescue voice recordings where sound only plays in one earphone.

Lossless Audio Export

Export uncompressed WAV or high-quality MP3 with pristine fidelity.

How to Use

Upload audio file

Select or drag & drop any MP3, WAV, M4A, OGG, or AAC file.

Choose conversion mode

Select Mix L+R to Mono, Left Only, Right Only, or Mono to Stereo.

Download converted audio

Click Download to receive your perfectly balanced audio track.

Online Stereo to Mono & Mono to Stereo Audio Converter Free

Have an audio recording that only plays in one headphone ear, or need to downmix stereo audio into a single mono channel for broadcasting or AI voice training? YupVox Stereo to Mono Converter offers 4 flexible matrix modes to merge channels, isolate Left/Right audio, or duplicate mono into dual stereo instantly.