Convert and batch-process
Choose an output format and process multiple files with the same private workflow. Completed files download directly from your device.
Free private audio converter
Your audio.
Your device.
Convert, trim, split, merge, and enhance audio locally, then leave with exactly the format you need.
No uploads Works offline Powered by FFmpeg
Drop audio or video here
or · MP3, WAV, FLAC, AAC, OGG, Opus, M4A, WebM, MP4
01
Local onlyInputs
Your selected media will appear here. Nothing is uploaded.
02
Engine loads on demandBuild workflow
Output format9 formats
Sound adjustmentsChoose a preset or fine-tune
AdvancedQuality, pitch, tone, dynamics, and fadesOriginal
One octave downOriginalOne octave up
CleanBassyOh my god
Normalize loudnessDisables manual gain
Voice cleanupReduce steady noise and low rumble
Dynamic compressorEven out quiet and loud moments
EchoAdd a short, restrained reflection
Reverse audioPlay the entire track backward
PipelineReview before running
ConvertMP3 output
Approximate working storageAdd files to estimate
03
0 readyLocal queue
Queued jobs run one at a time and remain recoverable on this device.
Browser storage0 B of unknown
Private by design
A free online audio converter that never uploads your files.
MusicMixer runs FFmpeg directly in your browser. Convert MP3, WAV, FLAC, AAC, OGG, Opus, and M4A audio; extract audio from WebM or MP4 video; or combine conversion with trimming, splitting, merging, loudness normalization, fades, pitch, speed, bass, and voice cleanup.
Edit without an account
Trim clips, split at markers, merge tracks in order, normalize volume, clean up speech, and tune quality without signing in.
Keep media on your device
Inputs, outputs, and recoverable jobs stay in browser-managed storage. MusicMixer has no media upload endpoint or analytics.
Audio converter FAQ
Which audio formats can MusicMixer convert?
MusicMixer can create MP3, WAV, FLAC, AAC, OGG, Opus, M4A, WebM, and MP4 files. It can also extract audio from supported audio and video inputs.
Are my audio files uploaded?
No. The hosted app processes selected files locally with WebAssembly and stores working media in browser-managed storage on your device.
Can I use the audio converter offline?
Yes, after the site and audio engine have been cached. Keep the tab open while a job runs because browsers can suspend work when the app closes.
Is MusicMixer free?
Yes. MusicMixer is free to use, requires no account, and is open source.