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MP3 to MP4 Converter

Convert MP3 to MP4 format right in your browser. Minimal effort, 100% free to use.
Upload your fileClick Choose File button to get started or drag and drop files to upload.
By uploading your file, you are agreeing to the Restream, Inc. Terms of ServiceandPrivacy Policy.

What is MP3?

An MP3 is a digital audio file that’s compressed so it’s easy to store and transfer. It’s a lossy format, meaning it drops some of the audio’s sound when it’s compressed. Most of this dropped sound is inaudible when you play it back, however. MP3 files can be about one-tenth the size of lossless audio files, making them easy to share, store and play back on most devices.

What is MP4?

MP4 is one of the most widely used video file formats. You can upload MP4 videos to popular social media sites like YouTube, Instagram, TikTok, Twitter and Facebook. Media players like Windows Media Player, VLC, QuickTime, iPhone, iPad and Android are also compatible with MP4 video files.

MP4s are popular not only for their compatibility with most devices but also for their ability to hold high-resolution videos without taking up much storage space. MP4 stands for MPEG4, and an MP4 file can contain video, audio, images and subtitles.

Frequently Asked Questions

How to convert MP3 to MP4 online?

  1. Choose a MP3 file from your computer or drag and drop it into Restream’s video converter.
  2. Select Convert and the converter will start processing.
  3. Download your MP4 file when it’s ready.

Will my file lose quality when I convert MP3 to MP4?

Depending on which file type you’re starting with, you might lose a little bit of quality when converting to MP4, but it’s such a small amount that it’s not noticeable.

Supported file formats

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