WAV / FLAC
Good for editing, mixing, and archive work. WAV is uncompressed PCM; FLAC preserves quality while using less space.
Local MediaBunny processing
Estéreo to Mono Converter
Mix left and right channels into one balanced mono track. Inspect channel peaks, choose an output format, and process everything in a background browser Worker.
Sem uploadBackground Worker, responsive UIWAV, MP3, M4A, FLAC
Step 1
Add your audio
Drop a file or browse your device. Analysis, mixing, and encoding happen on this device.
Estéreo to mono guide
Supported audio formats and exports
Read common MP3, WAV, M4A, AAC, FLAC, OGG, Opus, WMA, and AIFF audio, then export WAV, MP3, M4A, or FLAC. Whether a file opens depends on the codec inside it and the browser.
MP3
A compatible, smaller choice for everyday playback, sending, and uploads.
M4A (AAC)
A compact choice for Apple devices, mobile playback, and sharing.
Multichannel audio
The tool downmixes audio to one channel. Confirm the channel layout in a professional workflow for important surround projects.
How to convert stereo audio to mono online
No installation, account, or upload is needed. The current browser uses MediaBunny and a background Worker to read, analyze, and encode your file locally.
- 01
Add audio
Drop in or choose a file. The page builds lightweight left/right peak waveforms in the background instead of moving full PCM audio to the UI thread.
- 02
Check the mix
Compare left, right, and mono-mix peaks. A mono source is clearly shown as a preserved single channel.
- 03
Choose an output format
WAV and FLAC are useful for more editing; MP3 and M4A work well for sharing. Set 128–320 kbps for compressed exports.
- 04
Preview and download
Listen to the export, make sure no important content is missing, then download the mono file.
When do you need mono audio?
Mono puts audible content in one channel, making it particularly useful where stereo placement cannot be reproduced reliably.
Podcasts, interviews, and voice
Phone speakers, smart speakers, calls, and accessibility playback are often mono or near-mono; downmixing helps listeners avoid missing one side of a conversation.
Location recording and lessons
Mix channels to make two-microphone recordings more complete when played through ordinary speakers.
Public address and sound systems
Stores, exhibits, meeting rooms, and single-speaker systems commonly benefit from a mono signal.
Compatibility checks
Export a mono reference before publishing a video, track, or course to spot important sounds that exist only on the left or right.
Your audio never leaves this device
This page uses the File API, MediaBunny, and a Web Worker to analyze and encode audio in the browser. Source files are never sent to MediaKit servers; removing a file, cancelling a job, or closing the page releases local object URLs and Worker resources.
FAQ
Estéreo to mono FAQ
Are my files uploaded to a server?
No. There is sem upload step. Files are processed only by a background Worker in your current browser.
How are left and right mixed into mono?
The output downmixes channels into one. For ordinary stereo, the browser media pipeline uses standard downmixing so content from both sides can play through one speaker.
Does conversion reduce audio quality?
Downmixing changes the channel layout. WAV and FLAC avoid additional lossy compression; MP3 and M4A are re-encoded and better suited to smaller sharing files.
Can I use an audio file that is already mono?
Yes. Its one channel is retained and re-exported in your selected format.
Why can’t some files be opened?
Support depends on whether the browser can decode the codec used inside the file. Update the browser or convert the file to WAV, MP3, M4A, or FLAC first.
Does it work on a phone?
Yes. Use a recent browser, keep the page open for large jobs, and leave enough device memory available.
Related tools and tutorial
Swap audio channels
Fix a recording with left and right reversed.
Abrir ferramentaNormalize audio volume
Bring playback loudness across clips closer together.
Abrir ferramentaAudio equalizer
Adjust bass, treble, or voice clarity.
Abrir ferramentaAudio normalization guide
Learn about loudness, peaks, and pre-publish checks.
Abrir ferramentaRelated audio tools
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Swap the left and right channels of stereo audio with a dual-channel waveform preview. Process privately in a browser Worker and export WAV, MP3, M4A, or FLAC without uploading.
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Audio Equalizer
Equalize MP3, WAV, M4A, FLAC, and more with Bass Boost, Treble Boost, and Voice Enhance presets. A/B preview and export privately in your browser without uploading.
Audio Converter
Convert MP3, WAV, AAC, FLAC, Opus, and OGG files online in your browser. Choose quality presets, process multiple files, and download results without uploading audio.