Audio Converter

About this converter

Audio files split into uncompressed recordings, lossless compression and lossy codecs. WAV and AIFF store every sample, FLAC and ALAC shrink those samples without losing any, and MP3, AAC, Opus and Vorbis discard what listeners are least likely to hear. People bring voice memos, music rips, podcast masters and exports from editing software, often at sample rates and bit depths chosen for a different job.

This converter reads the formats below and writes the output you choose. When the target is a lossy codec the encoder sets a bitrate or quality level; when it is lossless the samples are preserved. Channels and sample rate are kept where the target allows, so a mono interview stays mono and a stereo master stays stereo.

How it works

Formats you can convert

The audio catalog spans studio masters, music libraries and voice recordings. Each format below is recognised on upload, and the target you choose decides the codec and bitrate of the result.

• MP3 — the universal lossy format, playable on almost every device
• AAC — the more efficient successor to MP3, common in phones and streaming
• M4A (AAC/ALAC) — an MP4 audio container, usually holding AAC or ALAC
• FLAC — lossless compression that keeps every sample at roughly half the WAV size
• WAV — raw PCM audio, the format of recordings and editing exports
• Ogg Vorbis — Ogg Vorbis, an open lossy codec used by many players
• Opus — a modern lossy codec that stays clear at low bitrates
• Windows Media Audio — Windows Media Audio, often DRM-protected and read-only here
• AIFF — Apple's uncompressed PCM container, the Mac counterpart of WAV
• Apple Lossless (ALAC) — Apple's lossless codec, usually stored inside an M4A file
• AMR — the narrow-band speech codec of older mobile phones, read-only here
• Audible (AAX) — Audible audiobooks, always protected and never produced here

Quality and what changes

Lossless sources keep their samples when the target is lossless: WAV and AIFF convert to FLAC or ALAC without changing a value. Moving to a lossy codec is different, because MP3, AAC and Opus remove detail the ear is unlikely to notice. A modern codec reaches the same perceived quality at a lower bitrate than an old MP3, so a second encode can sound clean even though it is not mathematically identical. The sample rate and channel count are preserved unless the target cannot carry them.

Privacy and limits

Guests can convert files up to 100 megabytes and run 5 conversions per day. A free account raises the limit to 500 megabytes and 25 conversions per day, and paid plans go up to 100 gigabytes.

Files you upload and the results you download are kept only long enough for you to collect them and are deleted after 2 hours. After that window nothing of yours remains on the server.

You do not need an account to convert a file; signing in only raises the size and daily limits.

Questions and answers