Audio Converter
How to use
Converts audio files, and the soundtrack of videos, to MP3 or WAV. Drop the files, choose the format, bitrate, channels and sample rate, and download.
Step 1 of 4: Upload
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Step 1 of 4 · Upload
- 1Upload
- 2Options
- 3Convert
- 4Download
- Converting a FLAC music library to MP3 for a car stereo or older player
- Turning WAV recordings from a field recorder into shareable MP3s
- Converting WhatsApp or Telegram voice notes (Opus/OGG) into MP3
- Producing WAV files for an audio editor or CD burning software
Free and private. Everything runs on your own device, with no account and no uploads.
Audio arrives in a dozen formats (WAV from recorders, FLAC from music libraries, M4A from phones, OGG and Opus from web apps and messengers) while most destinations want MP3, and audio editors often want WAV. This converter reads all of them, including the soundtrack inside MP4, MOV and WebM video, and writes MP3 at the bitrate you choose or uncompressed 16-bit WAV. Decoding uses your browser's own audio engine; MP3 encoding uses LAME compiled to JavaScript.
Not yet. Browsers include decoders for those formats but no encoders, and a local converter can only write what it can encode. MP3 and WAV cover the vast majority of needs.
Yes, MP3 is lossy. At 256–320 kbps the difference is inaudible to almost everyone; 192 kbps is transparent for most music on most equipment.
320 kbps for music you care about, 192 kbps as a general default, 128 kbps for podcasts and speech, and 96 kbps mono for voice notes where size matters most.
Safari cannot decode OGG Vorbis or Opus in some versions. Chrome, Edge and Firefox handle both.
Audio is decoded into memory first, roughly 10 MB per minute of stereo audio, so hour-long recordings are fine on a laptop but may be too much for an older phone.
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Add audio or video files
Drop MP3, WAV, FLAC, M4A, AAC, OGG, Opus, or a video file for its soundtrack.
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Choose MP3 or WAV
MP3 for sharing and playback; WAV for editing, burning or software that needs raw audio.
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Set bitrate, channels and sample rate
Defaults of 192 kbps stereo at 44.1 kHz suit music. Voice can go mono at 128 kbps.
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Convert and download
Files are converted one by one and bundled into a ZIP for batches.
- ·Choose mono for speech: it halves the file size with no loss of clarity
- ·Converting an MP3 to a higher-bitrate MP3 does not improve it; keep the original bitrate or lower
- ·Use 48 kHz when the audio is going back into a video project