Convert audio files between MP3, WAV, OGG, M4A, and FLAC, processed locally in your browser, never uploaded.
Your audio is processed locally with FFmpeg running in your browser. Nothing is uploaded; the file never leaves your device. First use downloads the ~31 MB engine once. Files up to 200 MB.
Accepts direct media links only (ending in .mp3, .wav, .m4a …). Platform pages (YouTube, Spotify, TikTok and similar) are not supported. URL files stream through our server once; uploaded files never leave your device.
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Audio formats exist for different jobs. MP3 is the universal choice: every player, car stereo, and editor reads it. OGG (Opus) delivers the best quality per byte of any modern codec, ideal for the web. M4A (AAC) is the native format on Apple devices and iTunes. WAV stores uncompressed PCM: zero loss, zero extra work for editors, but roughly 10 MB per minute of stereo. FLAC splits the difference, a lossless format that compresses to about half the size of WAV while preserving every original sample, which makes it the standard for archiving.
One rule governs every conversion: quality can never be added back. Converting MP3 to WAV does not restore what MP3 compression discarded; it only makes the file larger. Converting FLAC to MP3 keeps everything audible at a fraction of the size, which is exactly the right trade for casual listening. The reverse direction, MP3 to FLAC, just wraps lossy audio in a lossless container. Pick the smallest format that suits your purpose and you lose nothing that matters.
Conversion runs locally with FFmpeg compiled to WebAssembly, so your audio never leaves your device. Starting from a video instead? Use the Audio Extractor to pull the track out first, then convert it here. Related jobs: cutting a segment (Audio Cutter), converting whole videos (Video Converter), or removing audio tracks entirely (Video Muter).
No. MP3 compression permanently discards parts of the signal that psychoacoustics deems inaudible, and no conversion can rebuild them. Converting to WAV stores the decoded signal bit-exactly, so it sounds identical to the MP3 while taking roughly 10 MB per minute. Choose WAV when an editor or device needs uncompressed input, not to gain quality.
FLAC is the right choice when you want a lossless archive: CD rips, studio recordings, or any audio you may re-edit later. It compresses to about half the size of WAV with zero quality loss, and you can always convert it to MP3 or OGG for everyday playback without touching the original.
Both are lossy formats. M4A uses the AAC codec, which sounds slightly better than MP3 at the same bitrate, and it is the native audio format on Apple devices, iTunes, and the iTunes Store. MP3 is older but plays on literally everything, including car stereos and legacy hardware. When in doubt, pick MP3 for compatibility and M4A inside the Apple ecosystem.
Anything FFmpeg can decode, which covers effectively every audio file in wide use: MP3, WAV, OGG, M4A, AAC, FLAC, WMA, Opus, and AIFF. The file is identified by its actual content, not just its extension, so an MP3 mislabeled as .wav still converts correctly.
Files up to 200 MB are supported. Audio re-encoding is far lighter than video, so most files convert in seconds even in the browser. The practical ceiling is device memory: a very long file near the cap may fail on a machine with little RAM, and the tool will show a clear error instead of producing a broken download.