Audio / 04
Audio Converter: MP3, WAV, and Ogg
Convert audio to MP3, WAV, or Ogg Vorbis, from MP3, M4A, WAV, FLAC, Ogg, or the soundtrack of a video, at the quality you choose, without uploading the file.
Audio Converter: MP3, WAV, and Ogg: Your browser decodes the file, then the page encodes it again: MP3 with LAME, the reference MP3 encoder, Ogg Vorbis with libvorbis, or WAV as uncompressed 16-bit PCM. Surround sound is folded down to stereo with the centre and surround channels at −3 dB, the usual downmix. Runs 100% locally in your browser with zero server file uploads.
- Category
- Video tools
- Runs
- In your browser
- Cost
- Free · no sign-up
- Availability
- Ready to use
Runs entirely in your browser
MP3, M4A, WAV, FLAC, OGG, or a video's soundtrack · up to 250 MB, nothing uploaded
MP3 files are encoded with LAME, and Ogg files with libvorbis, both loaded as separate files the first time you use them. LAME is free software under the LGPL; its source is at lame.sourceforge.io.
Choosing a format
MP3 plays everywhere, from old car stereos to every phone, which makes it the safe choice for sharing. Ogg Vorbis gives a little better quality for the same size but some Apple devices and older players cannot open it. WAV is uncompressed and exact, and is what editing software and many upload forms for radio and podcasts ask for.
Each lossy conversion throws some detail away, and converting again loses a little more. Keep the original, convert from it rather than from a converted copy, and use WAV for any stage where you will keep editing.
Sample rate and channels
44.1 kHz is the CD and music standard; 48 kHz is the standard for video. Choose the rate of whatever the audio is going into, so it is not resampled again later. Mono halves the size of a WAV and suits speech recorded with one microphone; for music, keep stereo. To shorten a recording first, use the audio trimmer; to take the sound out of a video as it is, use video to audio.
How to use it
- Choose an audio file, or a video to take the sound from.
- Pick the format and quality, and mono if you only need one channel.
- Convert, listen to the result on the page, and download it.
Privacy & limitations
The file is decoded and encoded in your browser and never uploaded. MP3 encoding uses LAME, free software under the GNU LGPL, loaded as a separate file; its source is at lame.sourceforge.io.
Related tools
Frequently asked questions
Which MP3 quality should I choose?
192 kbit/s or the variable setting suit most music, and sound the same as the original to most listeners. 128 kbit/s is fine for speech and podcasts, and 320 kbit/s is the most MP3 allows. Converting from one compressed format to another never adds back detail the first one removed, so start from the best copy you have.
Which formats can it read?
Whatever your browser can decode: MP3, WAV, AAC and M4A, FLAC, and Ogg in every current browser, and Opus and WebM in most. The sound from MP4, MOV, and WebM videos works the same way. Apple Lossless (ALAC) and WMA depend on the browser and system.
Why is the WAV file so much larger?
WAV stores every sample uncompressed: about 10 MB a minute for CD-quality stereo, against roughly 1.4 MB for a 192 kbit/s MP3. Use WAV for editing or archiving, and MP3 or Ogg for sharing.
Is there a length limit?
The file can be up to 250 MB. The whole recording is held in memory while it is converted, so a very long one on a phone may run out of memory; a computer handles several hours.
Free tool · runs in your browser · no account required