MorphFlux
Free · No signup · Runs in browser

Free Online Audio Converter

Convert any audio format instantly in your browser using FFmpeg WebAssembly. MorphFlux supports MP3, WAV, AAC, M4A, OGG, FLAC and more. All conversions run locally on your device — your audio files never leave your browser.

Drop files here — any supported format

or click to browse — unsupported types are dimmed in the file picker · local processing

Max file size: images / data / documents 50 MB · audio & video 200 MB · subtitles 10 MB. This tool: up to 200 MB per file.

When would you need this?

Common scenarios where converting between audio formats saves time and improves compatibility.

Convert for device compatibility

Not all devices support every audio format. Convert M4A or OGG files to MP3 for universal playback on any device, car stereo, or legacy audio player.

Prepare audio for editing

Convert MP3 or AAC to WAV before importing into a DAW like Audacity, Logic Pro, or Pro Tools. WAV provides lossless quality for professional editing workflows.

Reduce file size for sharing

Convert large WAV or FLAC files to MP3 for easy sharing via email or messaging apps. MP3 files are typically 80-90% smaller than uncompressed WAV.

Archive music in lossless quality

Convert MP3 or AAC files to FLAC for long-term archiving. FLAC preserves audio without any further quality loss, ideal for music collections.

Convert Apple audio for wider use

Convert M4A files recorded on iPhone or Mac to MP3 for sharing with Windows users or uploading to platforms that don't support M4A.

Extract audio from video files

Use the Video Converter to extract MP3 or WAV audio from MP4, MKV, MOV, and other video formats directly in your browser.

Supported Formats

MorphFlux supports all major audio formats. All conversions run locally in your browser using FFmpeg WebAssembly.

MP3

MPEG-1 Audio Layer III — the most universally compatible audio format, supported by every device and application ever made. Uses lossy compression for small file sizes.

WAV

Waveform Audio — uncompressed audio format providing lossless quality. The standard format for audio editing, music production, and professional workflows.

AAC

Advanced Audio Coding — the successor to MP3, providing better quality at equivalent bitrates. The native format for Apple devices and the standard for streaming services.

M4A

MPEG-4 Audio — Apple's audio format used for Voice Memos, GarageBand, and iTunes. M4A is AAC audio stored in an MP4 container, natively supported by all Apple devices.

OGG

Ogg Vorbis — an open-source audio format with no patent restrictions. Widely used in open-source software, games, and applications that prefer royalty-free formats.

FLAC

Free Lossless Audio Codec — compresses audio without any quality loss. The standard format for audiophile listening, music archiving, and high-fidelity audio systems.

Frequently Asked Questions

Common questions about converting audio formats online.

Which audio formats are supported?

MorphFlux supports MP3, WAV, AAC, M4A, OGG, and FLAC. You can convert between any supported combination of these formats.

Are my audio files uploaded to a server?

No. All audio conversions run entirely in your browser using FFmpeg WebAssembly. Your files never leave your device.

Is there a file size limit?

Audio files up to 200MB are supported. Since conversion happens in your browser, there are no server-side restrictions.

Will I lose audio quality during conversion?

Converting between two lossy formats like MP3 and AAC will cause some quality loss. Converting to lossless WAV or FLAC preserves the current quality without further loss.

How long does audio conversion take?

Conversion speed depends on your device and file size. Most audio files convert in under a minute. The first conversion may take a few extra seconds while FFmpeg loads.

What is the best format for music listening?

For casual listening, MP3 or AAC at 320kbps provides excellent quality. For audiophile listening or archiving, FLAC provides lossless quality with no compression.

Can I convert M4A files from my iPhone?

Yes. M4A files recorded on iPhone using Voice Memos or GarageBand are fully supported. Convert them to MP3 for universal compatibility.

Can I extract audio from a video file?

Yes. Use the Video Converter section to upload an MP4, MKV, or MOV file and select MP3 or WAV as the output format to extract the audio track.