How to Convert MP4 to MP3

Sometimes you only need the sound of a video: a lecture, a voice note, a recorded song or a family event. Converting an MP4 to an MP3 gives you a small audio file that plays on any phone or music player. This guide shows how to do it in your browser, and how to choose the right quality.

Use this only for files that you own or have permission to use.

The short answer

1. Open the free Solyptube MP4 to MP3 converter.
2. Choose the video file on your phone or computer.
3. Pick the audio quality. 192 kbps is a good choice.
4. Press Convert, then download the MP3.

MP4 and MP3: what is the difference?

MP4 is a video file. It holds the picture and the sound. MP3 is an audio file that holds only the sound, so it is much smaller. When you convert, the picture is dropped and the sound is kept.

Which quality should I pick?

• 128 kbps: small file. Fine for speech, lectures and voice recordings.
• 192 kbps: a good balance for most music and speech.
• 320 kbps: the highest quality. The file is bigger, and it cannot sound better than the original video.

Step by step

1. Open the converter page in Chrome, Edge, Firefox or Safari.
2. Tap the box and choose the video from your phone or computer, or drag the file into the box.
3. Choose the audio quality.
4. Press Convert and wait until the progress bar finishes.
5. Play the preview, then press Download.

If the conversion fails

• Check that the video has sound. A file with no audio track cannot be converted.
• Try a smaller file. Very large videos can run out of memory in a browser, especially on a phone.
• Use a computer for long recordings.
• Update your browser and try again.

Is my file uploaded?

No. The conversion runs in your browser, so your file stays on your device. The first time you use it, a converter of about 30 MB is downloaded once and kept in your browser.

Where is the MP3 saved?

• Android: usually in the Downloads folder.
• iPhone: in the Files app, under Downloads.
• Computer: in your browser's Downloads folder.

Which file type should you use for videos? Read MP4 vs WebM vs MOV. Need a smaller video file? See how to compress a video.

Frequently asked questions

How do I convert MP4 to MP3?

Choose your MP4 file in the converter, pick an audio quality and press Convert. Then download the MP3.

Is the conversion free?

Yes. You do not need an account or an app.

Does converting reduce the sound quality?

MP3 is a compressed audio format, so a small amount of detail is lost. At 192 kbps most people cannot hear the difference for everyday listening.

Can I convert a video from YouTube or another website?

This tool works only on files you already have on your device. Only use videos and audio that you own or have permission to use.

Is there a file size limit?

The page accepts files up to 2 GB, but a browser can run out of memory on very large files. A computer handles bigger files better than a phone.