3 Steps to Free Convert MP3 to MP4 Online

Posted by Jane Winston February 02, 2023 10:20
RatingsFour Star(203)
Add FileConvert to:MP4
Download Download Desktop Version

Free Online Video Converter - Free Convert MP3 to MP4

  • 1Open Add File to quickly install a small-size launcher.
  • 2Click "Add File" button again to upload MP3 file you want to convert.
  • 3Click Convert button to start converting MP3 to MP4 on the web. After converting, the output MP4 will be automatically downloaded to your computer.
MP3 to MP4


MP3 (MPEG-1 Audio Layer 3) can only be used for audio. Back in the early-1990s, MP3 was considered a the MPEG audio standard. Now it is the most popular audio format. By reducing the audio file size while affecting sound quality, MP3 is widely supported by media players, music software, and online streaming sites.

MP3 is a lossy compression. But in fact, the audio compression is beyond the hearing range of the average person. So you won't feel a bad sound quality. Relatively speaking, MP3 will always be smaller than equivalent MP4.

MP4 (MPEG-4 Part 14) is a multimedia facilitator which can hold videos, audio, subtitles, texts and more. MP4 is developed based on Apple's QuickTime MOV format. But compared with MOV, MP4 is added various other MPEG features. It is the most popular video format.

MP4 is more flexible than MP3. It can handle both AAC (Advanced Audio Coding) and ALAC (Apple Lossless Audio Coding). Overall, MP3 is an audio coding format, and MP4 is more like a digital multimedia container format.

Convert MP3 to MP4 with desktop version

If you have the need to convert many MP3 files to MP4, or you want to edit MP3 before conversion, maybe the desktop version of this Free Online Video Converter is a better choice. Here you can free download its desktop version and take the following guide to convert MP3 to MP4.

Step 1. Install and run this powerful MP3 to MP4 Converter on your computer.

MP3 to MP4 Converter

Step 2. Click Add File to load the MP3 files you want to convert to MP4. As we mentioned above, it enables you to convert many MP3 audio to MP4 at a time.

Add MP3 Files

Step 3. Many editing features are offered in this desktop version of Free Online Video Converter. When you convert videos, you are allowed to rotate/clip/crop video, merge several video clips into one, customize image/sound effects, enhance video quality and more.

Edit Video

What's more, a built-in media player will help you easily view the editing changes. After that, you can get MP4 videos you really like.

Step 4. Click Profile and select MP4 from the drop-down list. Then click Convert to start converting MP3 to MP4.

Convert MP3 to MP4

You can free convert MP3 to MP4 online after reading this post. Free Online Video Converter can do you a great favor when you have any video or audio converting need. Surely you are suggested downloading the desktop version, Video Converter Ultimate. Compared with the online MP3 to MP4 converter, it can provides a better conversion experience.

Free Online Video Converter VS. Video Converter Ultimate (Desktop)

Feature Free Online Video Converter Video Converter Ultimate (Desktop)
Output audio formats MP3, AAC, MKA, M4A, AC3, M4B, WMA, M4R, WAV, AIFF, FLAC Over 1000 formats
Conversion speed Depend on Internet 30X faster
Conversion quality Good Lossless quality
File size limitation No No
Safety Safe to use Completely safe without any Internet connection
Edit audio No Clip, merge
Audio effect No Volume adjustment
Batch converting No Yes
Require Internet Yes No
Convert DVD No Yes
Preview effects No Yes
Extract audio from video Yes Yes
DownloadBuy NowDownloadBuy Now

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