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File converter / Audio / MP3

Online MP3 converter

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Choose file to convert to .mp3
or drag and drop file

You can convert music or sound to MP3 format with free online converter.

How to convert to mp3
Step 1

Upload file

Select file, which you want to convert from your computer, Google Drive, Dropbox or drag and drop it on the page
Step 2

Select «to mp3»

Select mp3 or any other format, which you want to convert (more 200 supported formats)
Step 3

Download your mp3 file

Wait till your file will be converted and click download mp3 -file

Online and free mp3 converter

Fast and easy
Just drop your mp3 files on the page and you can convert it to more than 250 different file formats without registration, giving an email or watermark.
Don't worry about security.
We delete uploaded mp3 files instantly and converted files after 24 hours. All files transfer with secured an advanced level of SSL encryption.
All in the cloud
You don't need to install any software. All mp3 conversions make in the cloud and don't use any resources of your computer.
MP3 Audio File
File extension .mp3
File category audio
Description

MP3 (formally MPEG-1 Audio Layer-3 or MPEG-2 Audio Layer-3) is a digital format for storage of audio files as well as for audio streaming. The format was designed by MPEG programmers. It is one of the most required codecs for digital coding. The format is widely used in various file-sharing sites for evaluation downloading.

Due to lossy compression in this audio format, it is possible to compress CD tracks up to 1/10 of their original size while maintaining high playback quality. Moreover, it can be encoded at higher or lower bit rates to adjust the resulting quality. Overtones, which cannot be perceived by a human ear, are removed. Complex algorithms allow for smaller size of tracks. As a result, one compact disk can contain several hundred songs. MP3 is compatible with all most popular operating systems and supported by the most of modern DVD-players and music systems.

Technical details

Prior to MP3 introduction, MPEG-1 had been widely used. That format contained not only audio data, but images as well. MP3 breaks an audio file into parts of the same length. When the processing is over, each part is packed into its own frame. It involves the technology of spectral limit that requires a continuous input signal to provide the use of two adjacent frames.

When spectral deleting is over, the file is to be compressed with mathematic methods. If necessary, compression rate can be changed, even inside the same frame. Files of 128 kbit/s have 11-fold compression. Further reduction of the file size will lead to significant deterioration in sound quality.

Programs
Microsoft Windows Media Player
VLC media player
MPlayer
jetAudio
Zune
Audacity
Apple iTunes
Plex Media Center
Amarok
Xine
Totem
Developer Moving Picture Experts Group
MIME type
audio/mp3
audio/mpeg3
audio/mpg
audio/mpeg
audio/x-mpeg
audio/x-mpeg-3
audio/mp3
audio/x-mpegaudio
audio/x-mpg
audio/x-mp3

FAQ

❓ How can I convert mp3?
Firstly, select a mp3 file you want to convert or drag and drop it. Secondly, select a format you want to convert your file to. Then click convert and wait until your file is converted
⏳ How long should I wait to convert mp3?
audio conversion usually takes a few seconds. You will convert mp3 very quickly.
🛡️ Is it secure to convert mp3 on OnlineConvertFree?
Sure! We delete your uploaded and converted files, so nobody has access to your information. All types of conversion on OnlineConvertFree (including mp3) is 100% safe.
📱 Can I convert mp3 without software installation?
Absolutely! OnlineConvertFree doesn’t require installation. You can convert any files (including mp3) online on your computer or mobile.