MP3 to MP4 Converter
Pair your audio with a picture and download an MP4 that video sites accept.
Drop your file hereTap to choose a file
or click to browse, or paste from the clipboard
MP3, JPG, JPEG, PNG, WEBP
Max file size: 100 MiB
Add a cover image
Combine the MP3 with one JPG, PNG or WebP picture. Without an image, the video shows a plain black or white background.
Sized for each platform
Choose 16:9 for YouTube, 1:1 or 4:5 for feed posts, 9:16 for Shorts, Reels and TikTok, or match the shape of your image.
A small still-image video
The picture is stored as H.264 at two frames per second, so most of the file is the AAC audio rather than repeated video frames.
How to convert MP3 to MP4
- 1
Choose your MP3 and, if you want a picture, one JPG, PNG or WebP image.
- 2
Select the video size, how the image fits, the background and the audio bitrate.
- 3
Convert, download the MP4 and upload it to YouTube or your social account.
What people use this tool for
- Upload a song, podcast episode or voice recording to YouTube.
- Share music with its cover art as a square or vertical video.
- Post an audio clip where only video uploads are allowed.
Frequently Asked Questions
How do I add a picture to an MP3?
Choose the MP3 and one JPG, PNG or WebP image together, in any order; the converter recognises which file is which. Pick a video size, how the image fits and a background, then convert. Without an image, the video uses a plain background.
Will YouTube accept the MP4?
Yes. The MP4 uses H.264 video and AAC audio, the codecs YouTube recommends for uploads. The picture runs at two frames per second to keep the file small. Most players and video sites accept this, but an app that requires a standard frame rate may re-encode or refuse a still-image video.
Which video size should I choose?
Use 1920 × 1080 for YouTube, 1080 × 1080 or 1080 × 1350 for feed posts and 1080 × 1920 for Shorts, Reels and TikTok. Show the whole image adds bars in the background colour or a blurred copy of the picture; Fill the frame crops the edges of the image instead.
What are the limits?
Use one MP3 of up to 100 MiB and between half a second and 30 minutes long, plus an optional image of up to 30 MiB and 50 megapixels. The MP4 can be up to 80 MiB. If a long recording at 320 kbps is too large, choose a lower audio bitrate.
Does the sound change?
The MP3 is decoded and re-encoded as stereo AAC at the bitrate you choose, 192 kbps by default, at 44.1 or 48 kHz. Re-encoding cannot add detail, so choose a bitrate at least as high as the MP3's. Artwork embedded in the MP3 and its tags are not used; add the cover as a separate image.
Where are files processed and when are they removed?
This tool uploads files to Zutilium's server for processing. After a successful conversion, uploads are scheduled for deletion after about one minute and generated downloads after about ten minutes. Cleanup runs periodically, so removal is not immediate. Save your result promptly.