Online Audio Players

MP3 and AAC are the dominant compressed audio formats for music distribution and podcasting. MP3 achieves 10:1 or better compression ratios using perceptual audio coding, discarding frequency content below the threshold of human hearing. It is supported by every device and platform without exception, making it the safest choice for wide distribution. AAC is the technical successor to MP3 and provides noticeably better quality at equivalent bitrates, particularly at lower bitrates under 128 kbps. AAC is the default format for Apple Music, iTunes purchases, and many streaming services. Both formats are lossy — some audio data is permanently removed during encoding — but at high bitrates (192 kbps and above) the difference from the original is imperceptible to most listeners.

WAV stores raw PCM audio with no compression. Every sample from the original recording is preserved exactly, making WAV the standard working format for audio editing, mastering, and professional production. A minute of CD-quality stereo audio in WAV format is approximately 10 megabytes, compared to about 1 megabyte for an equivalent MP3. WAV is universally supported across all operating systems, digital audio workstations, and hardware devices. Because no encoding decisions are made during recording or export, WAV files have no generation loss — you can edit and save them repeatedly without any quality degradation.

FLAC (Free Lossless Audio Codec) bridges the gap between WAV and compressed formats. It uses lossless compression to reduce file size by 40–60% compared to WAV while preserving every bit of the original audio data exactly. FLAC files can be decoded back to the identical PCM stream as the source, making them ideal for audio archiving, audiophile music collections, and any use case where quality is paramount but WAV file sizes are impractical. FLAC is widely supported on desktop media players and Android devices, though browser support requires the Web Audio API to decode it in software.

OGG Vorbis, Opus, and WebM audio are open-source formats developed without patent restrictions. OGG Vorbis was designed as a higher-quality alternative to MP3 at equivalent bitrates, and it achieves this goal particularly well at lower bitrates. Opus is a modern successor that outperforms both MP3 and OGG Vorbis at all bitrates and excels in speech and low-bitrate scenarios, making it the format of choice for voice calls, podcasts, and web audio. WebM audio is the audio track format used in WebM video containers, typically encoded as Opus or Vorbis. Browser-based playback via the Web Audio API decodes each of these formats natively without any plugin or external codec installation.