What Is an Audio Converter?
An audio converter is a tool that changes an audio file from one format to another — for example, converting a FLAC file to MP3, or a WAV recording to AAC. Different audio formats use different compression algorithms, bitrates, and container types, making them suited to different use cases: some prioritize quality, others prioritize compatibility, and others minimize file size.
This online audio converter runs entirely in your browser using FFmpeg compiled to WebAssembly — the same encoding engine used in professional video and audio production pipelines. Your files never leave your device, making it safe for personal recordings, confidential audio, or copyrighted music you've purchased.
Audio Format Guide
Music streaming, ringtones, podcasts, general sharing. The most widely supported format on the planet.
Professional audio editing, broadcast, archiving. Zero quality loss from the original source.
Music archiving, audiophile listening, digital music libraries. ~50–70% smaller than WAV, identical quality.
Web apps, Android, open-source projects. Better quality per kilobyte than MP3 at equivalent bitrates.
Apple devices, iTunes, iPhone ringtones (.m4r). Better quality than MP3 at the same bitrate.
Streaming services, broadcasting, YouTube audio. The successor to MP3 with superior compression.
What Is Bitrate?
Bitrate is the amount of audio data encoded per second, measured in kilobits per second (kbps). Higher bitrate means more data retained, which means better audio quality — but also a larger file size. For lossy formats like MP3, AAC, and OGG, bitrate is the primary quality lever. For lossless formats like WAV and FLAC, bitrate is determined by the sample rate and bit depth, not a compression setting.
| Bitrate | Quality | Best Use | File Size (3 min) |
|---|---|---|---|
| 320 kbps | Highest (near-lossless) | Audiophile listening, professional masters | ~7.2 MB |
| 256 kbps | Excellent | High-quality music collection | ~5.8 MB |
| 192 kbps | Very good | Recommended for most uses | ~4.3 MB |
| 128 kbps | Good | Podcasts, voice, casual listening | ~2.9 MB |
| 96 kbps | Acceptable | Voice calls, low-storage devices | ~2.2 MB |
Lossless vs. Lossy Audio
Lossless (WAV, FLAC)
- Bit-for-bit identical to the original recording
- No audio data is discarded during encoding
- WAV is uncompressed — FLAC is compressed losslessly
- Larger file sizes (WAV is largest, FLAC ~50% smaller)
- Best for archiving, editing, and audiophile listening
- Converting lossless → lossless loses nothing
Lossy (MP3, AAC, OGG, M4A)
- Uses psychoacoustics to discard inaudible data
- Significant file size reduction vs. lossless
- Quality depends on bitrate — higher = less compression
- At 320 kbps, most listeners cannot distinguish from lossless
- Re-encoding lossy → lossy degrades quality (generation loss)
- Best for streaming, storage, and everyday listening
Frequently Asked Questions
Technical note: This tool uses FFmpeg.wasm — a port of the professional FFmpeg encoder suite compiled to WebAssembly. The first conversion in a session requires downloading the ~30 MB WASM binary, which is cached by your browser for subsequent uses. All codec processing (libmp3lame, libvorbis, libopus, aac, flac) runs client-side at near-native speed.