ConvertFree

Free Online Audio Converter

Convert between audio formats instantly in your browser. From lossless FLAC and WAV to compressed MP3, AAC, and OGG — all without uploading a single file.

Privacy-First: Files stay on your device

Supported Audio Formats

MP3

MPEG Audio Layer III

WAV

Waveform Audio File Format

AAC

Advanced Audio Coding

FLAC

Free Lossless Audio Codec

OGG

Ogg Vorbis

M4A

MPEG-4 Audio

WMA

Windows Media Audio

OPUS

Opus Interactive Audio Codec

AIFF

Audio Interchange File Format

Audio Conversions

Convert between any audio format

About Our Audio Converter

Our free audio converter handles conversions between MP3, WAV, AAC, FLAC, and OGG — the five most important audio formats. Whether you need to compress a large WAV recording to MP3 for sharing, convert FLAC to MP3 for your portable player, or transcode between any other combination, our tool handles it instantly.

All audio processing happens directly in your browser using WebAssembly-powered FFmpeg. This means your audio files — whether they contain music, voice recordings, podcasts, or confidential meetings — never get uploaded to any server. Your data stays entirely on your device throughout the entire conversion process.

You can adjust output quality settings including bitrate for lossy formats (MP3, AAC, OGG) to find the perfect balance between file size and audio fidelity. For lossless conversions (WAV to FLAC or FLAC to WAV), the audio data is preserved bit-for-bit with no quality degradation whatsoever.