MP3
Plays on absolutely everything: phones, cars, speakers, TVs and any program. If you don't know which to pick, pick MP3.
Audio tool
Convert audio
Change the format of your songs, voice notes and recordings so they play on any device or program.
Select your audio file
Convert it to MP3, WAV, M4A, OGG, FLAC or OPUS at the best quality for each format.
Your files are processed temporarily and deleted automatically.
01
Select
Upload your audio in almost any format.
02
Choose the format
MP3, WAV, M4A, FLAC, OGG or OPUS.
03
Download
Get your converted audio in seconds.
When your audio won't play where you need it
A WhatsApp voice note that won't open on your computer, a phone recording in M4A your video editor doesn't recognize, a huge WAV file that won't fit in an email, or a FLAC song your car can't read. They're all format problems, and they're solved by converting the file to a compatible one.
Convert audio accepts MP3, WAV, M4A, AAC, OGG, OPUS, FLAC, WMA, AMR, AIFF and more, and produces the format you choose at the highest quality for each: MP3 at 320 kbps, M4A at 256 kbps, and lossless formats (WAV and FLAC) identical to the original.
Which format should I choose?
WAV
Uncompressed audio. It's what editing programs, radio stations and some phone systems ask for. It's much bigger.
M4A
Apple's format: ideal for iPhone, iTunes and ringtones. Sounds great at a small size.
FLAC, OGG and OPUS
FLAC keeps perfect quality at half the size of WAV. OGG is an open format widely used in games and Linux. OPUS is excellent for voice and podcasts.
How to convert audio with SoloHazlo
Upload your file
Up to 150 MB and 2 hours long.
Choose the output format
Check the guide above if you're unsure. The file name is kept with the new extension.
Download
You'll see the duration and the size before and after.
About sound quality
Converting doesn't improve the audio. If the original is a low-quality MP3, turning it into WAV or FLAC won't recover what was already lost; it'll just make the file bigger.
Nothing is lost going from one lossless format to another. Between WAV, FLAC and AIFF the conversion is exact.
To save space, instead of converting use Compress audio, which is made for that.
Common problems and how to fix them
My WhatsApp voice note is .opus or .ogg
Upload it as is and convert it to MP3: you'll be able to open it on any computer or edit it.
The converted file is much bigger
That's normal when converting to WAV or FLAC, which don't compress the sound (or compress it losslessly). For a light file, choose MP3, M4A or OPUS.
It says the file couldn't be read
It may be damaged or incomplete. Check that it plays on your device. If it's a video, use Video to MP3.
What happens to your files
Your audio is sent to our server only to convert it. The original is deleted as soon as the process ends, and the result is available through a private link that's deleted automatically shortly after. We don't listen to or share your files.
Frequently asked questions about converting audio
Are the title and artist kept?
Yes. The song's details (title, artist, album) are copied to the new file when the format allows it.
Can I convert several files at once?
For now, one is converted at a time. If you want to join them into a single track, use Merge audio.
Does it work on a phone?
Yes. On Android and iPhone, pick the file from Files or Downloads and save the result to your phone.
Does it cost anything?
No. It's free with no sign-up. The site is supported by ads.