Audio Converter
Which format the audio converter should write
MP3 when the file has to travel
MP3 is the format phones, cars, chat apps and video editors all accept, and it is the smallest of the three. At 192 kbps a four-minute stereo song comes out at roughly 5.5 MB; 320 kbps is about 9 MB and is worth it only when the source was lossless.
WAV when the next step is an editor
WAV stores every sample with no compression, as 16- or 24-bit PCM or 32-bit float, so a DAW, a sampler or a video timeline reads it instantly and nothing is lost between edits. The price is size: about 10 MB per stereo minute at 44.1 kHz and 16 bits.
FLAC when you want lossless but smaller
FLAC keeps the same samples as WAV and decodes back to them exactly, typically in 50 to 70 percent of the space. It suits an archive or a music library; some video editors and older devices still do not open it.
M4A or OGG when a player or platform asks for it
M4A holds AAC, the format iPhones and Apple Music use, and at the same bitrate it usually sounds cleaner than MP3. OGG here holds Opus, the codec of many games and voice apps, always at 48 kHz. Both come from the browser’s own encoder, so they are listed as not available in a browser that has none; AAC is the same audio as M4A without the container, for tools that ask for a bare .aac file.
Convert audio in three steps
Add up to ten files
Drop files onto the converter or choose them, record from the microphone, try a sample track, or open one of your own songs from My music. Each file may be up to 90 MB and 15 minutes long, and anything your browser can play will open.
Choose the output
Pick MP3, WAV, FLAC, OGG, M4A or AAC. For MP3, choose 128, 192, 256 or 320 kbps; OGG, M4A and AAC have quality lists of their own. Set 44.1 or 48 kHz, or a studio rate up to 192 kHz for WAV and FLAC (OGG is always 48 kHz), and stereo or mono; changing a setting queues every file again.
Convert and download
Files convert one after another so the browser never holds the whole batch in memory. Each row shows the size before and after; play the result, download it as it finishes, or download the finished batch as one ZIP.
What the converter does
Audio converter formats and limits
MP3, WAV (16-bit, 24-bit or 32-bit float) and FLAC (16- or 24-bit) in every browser; OGG (Opus), M4A and AAC where the browser has the encoder.
128, 192, 256 and 320 kbps constant bit rate.
Each up to 90 MB and 15 minutes long.
Decoding and encoding run in your browser, so the converter uses no credits and needs no account.
Audio converter questions
Need to trim it first?
Cut the part you need with the audio cutter, or layer several files into one track with the audio mixer.