Change a sound file into the format you need
- MP3, M4A, WAV or FLAC out
- Song tags carried over
- Converted where the file is
Straight to a common swap
- M4A to MP3 Voice memos and iTunes files, for players that only know MP3.
- WAV to MP3 Studio and recorder files down to something you can send.
- MP3 to WAV For editors, CD burners and anything that asks for WAV.
- FLAC to MP3 Lossless albums onto players and cars that will not read FLAC.
A program that only opens WAV, a car that only plays MP3, a phone that saved everything as M4A. Pick the format the other side wants and drop the file; it is rewritten in this browser tab and handed back with the new ending.
Format, not size
This changes what kind of file it is. The result can be bigger — an MP3 turned into a WAV grows about tenfold — and that is correct.
See for yourself it stays here
Press F12, open the Network tab and convert a file. The converter loads once; no request carries your recording.
Converter or compressor?
Both pages take a WAV and can give back an MP3, so it is fair to ask which to use. Ask what the problem is. If something will not open or play the file, it is a format problem, and this page answers it at a quality high enough that you will not hear the change. If the file opens fine but is too big to send, it is a size problem, and the audio compressor is the page that lets you trade quality for megabytes or type the size it must fit under.
How each output is written
- MP3 at 192 kbps for stereo and 96 for mono, never much above what a compressed source already used. At most two channels and 48 kHz, which is all MP3 holds.
- M4A with AAC at the same rates. Keeps every channel the source has.
- WAV as 16-bit PCM at the source’s sample rate — the CD format, readable by anything that takes WAV.
- FLAC at the source’s rate and depth, lossless: unpack it and you get back exactly what went in.
Checking that nothing is uploaded
- Open this page in Chrome, Edge or Firefox and press F12.
- Choose the Network tab and clear it.
- Drop a file and convert it. The only large download is the converter engine itself, from this site, the first time.
- Look for a request whose size matches your file going out. There is none. You can also switch the tab to Offline once the engine has loaded, and the conversion still finishes.
Common questions
Which output format should I pick?
MP3 when you do not know what will play it. M4A when everything is Apple. WAV when a program insists on WAV — editors, CD burners, sampler hardware. FLAC when you want to keep the sound exactly and still save space.
Why can I not convert to OGG or Opus?
Both are read here, but the encoders for writing them in the engine this page runs on were measured failing — one stops the engine outright, the other ignores the quality it is given. Rather than hand back a file that might be wrong, they are not offered.
Can it take the sound out of a video?
Yes. Drop an MP4, MOV, MKV or WebM and the first sound track is written out in the format you picked. The picture is not kept. For an MP3 with a quality choice, the video to MP3 tool does the same with presets.
What does it do to my song tags?
Title, artist, album, track number and similar text tags are copied into the new file. Embedded cover art is not, so a music app may show the converted file without artwork.
Something says it cannot read my file. Why?
Either there is no sound track in it, or the sound is in a codec this engine does not decode — copy-protected iTunes .m4p files are the usual case. If you picked the format the file already is, it says that instead, and points to the compressor.