Audio Converter
Convert WAV, MP3, M4A, OGG and FLAC files to MP3, WAV or OGG, without uploading them.
Works in your browser. Your audio files are never uploaded.
or drop them anywhere in this box
WAV, MP3, M4A, OGG, FLAC and more, as many as you like. They never leave your device.
WAV is saved as 16-bit PCM at the original sample rate, so it plays and edits anywhere.
Audio Converter at a glance
- Price
- Free
- Files uploaded
- None, it runs in your browser
- Opens
- WAV, MP3, M4A, AAC, OGG, Opus, FLAC
- Saves as
- MP3 (128 to 320 kbps), WAV (16-bit), OGG
- Batch
- Yes, with a ZIP download
- Watermark or time limit
- None
How to use Audio Converter
- Choose your audio filesPress Choose audio files or drop them into the box. You can add more later with Add more.
- Pick the formatChoose MP3, WAV or OGG. For MP3, pick the quality: 192 kbps suits most music, 320 kbps is the best, 128 kbps makes the smallest file.
- Play and downloadEach file converts straight away. Press the play button to listen, then Download, or Download all (ZIP) for the whole batch.
Drop in songs, recordings or voice memos and save them as MP3, WAV or OGG. The converter opens WAV, MP3, M4A, AAC, OGG, Opus and FLAC files, keeps the original sample rate and stereo or mono, and lets you choose the MP3 quality from 128 to 320 kbps. Convert one file or a whole batch, play each result before you save it, and download them one by one or together in a ZIP. Everything happens inside your browser, so your audio never leaves your device, and there is no watermark, time limit or sign-up.
Popular conversions
WAV to MP3 Converter · MP3 to WAV Converter · M4A to MP3 Converter · OGG to MP3 Converter · FLAC to MP3 Converter
This free audio converter changes sound files from one format to another inside your browser. It opens the formats phones, computers and recorders actually produce, keeps the sound's sample rate and channels, and saves it in the format your app, player or website asks for.
MP3 quality and file size
| Setting | Size per minute (stereo) | Good for |
|---|---|---|
| MP3 128 kbps | About 1 MB | Speech, podcasts, voice memos |
| MP3 192 kbps | About 1.4 MB | Most music, everyday listening |
| MP3 256 kbps | About 1.9 MB | Music you care about |
| MP3 320 kbps | About 2.4 MB | The best MP3 quality, from lossless originals |
| WAV 16-bit, 44.1 kHz | About 10.6 MB | Editing, DJ software, samplers, CDs |
OGG files are sized by quality rather than a fixed bitrate, so quiet or simple sound makes smaller files than busy music at the same setting.
What is kept, and what is not
- Kept: the sound itself, its length, the sample rate (up to 48 kHz for MP3) and whether it is stereo or mono. Surround recordings are mixed down to stereo.
- Not kept: details stored alongside the sound, such as title, artist, album, cover art and chapter marks.
- Not possible: converting protected songs downloaded from streaming services, or bringing back quality a compressed file has already lost.
Which files open in which browser
The converter uses your browser's own ability to read audio. Chrome, Edge and Firefox open WAV, MP3, M4A, AAC, OGG, Opus and FLAC. Safari opens WAV, MP3, M4A, AAC and FLAC, and OGG and Opus from version 18.4. If one browser will not open a file, another usually will.
Your own music and recordings
Convert recordings you made and music you have the right to use. Converting a file does not change who owns it, so sharing or publishing someone else's music still needs their permission.
What it does
- Opens WAV, MP3, M4A, AAC, OGG, Opus and FLAC files
- Saves as MP3 at 128, 192, 256 or 320 kbps, as 16-bit WAV, or as OGG
- Keeps the original sample rate and stereo or mono
- Convert many files at once and download them together in a ZIP
- Play each converted file before you download it
- Shows the length, channels and before and after file size
- No upload, no watermark, no time limit, no sign-up
Questions
Which MP3 quality should I choose?
192 kbps sounds the same as the original to most listeners and is a good default for music. Choose 320 kbps for the best quality MP3 can give, or 128 kbps for speech, podcasts and the smallest files. As a guide, a minute of stereo audio takes about 1 MB at 128 kbps, 1.4 MB at 192 kbps and 2.4 MB at 320 kbps.
Does converting audio lose quality?
Saving as WAV loses nothing, so it is the choice for editing. MP3 and OGG make files much smaller by leaving out detail that is hard to hear; at 192 kbps and above most people cannot tell the difference. Converting a file that is already MP3 or M4A to MP3 again cannot bring back what was lost, so start from the best copy you have.
Why is my WAV file so much bigger than the MP3?
WAV stores every sample without compression. CD-quality stereo WAV takes about 10.6 MB per minute, while a 192 kbps MP3 of the same audio takes about 1.4 MB, roughly seven times less.
Can I convert an iPhone voice memo?
Yes. Voice Memos saves recordings as M4A files. Save the memo to the Files app, open this page, choose the file and save it as MP3 or WAV.
Can I convert WhatsApp voice messages?
Voice messages saved from WhatsApp usually end in .opus or .ogg. Chrome, Edge and Firefox open them, and so does Safari from version 18.4. Choose the file and save it as MP3 to play it anywhere.
Are song titles, artist names and album art kept?
No. The converter saves the sound only, so details such as title, artist and cover picture are not copied into the new file. Most music apps let you add them again.
Is the sample rate changed?
No, the original sample rate and stereo or mono are kept. The one exception is MP3, which goes up to 48 kHz: higher-rate files, such as 96 kHz studio recordings, are saved as MP3 at 48 or 44.1 kHz.
Why will a file not open?
The file may be damaged, or protected against copying, as songs downloaded from streaming services are. Some formats also depend on the browser: older versions of Safari cannot open OGG, for example. Try another browser if a file will not open.
Are my files uploaded?
No. Your browser does the conversion on your own device, so your audio is never sent to us or anyone else. The MP3 and OGG encoders are loaded from this site the first time you use them.
Is it free?
Yes, completely free, with no sign-up, no watermark and no limit on length or number of files.