MP3 to MP4 converter
Put your MP3 in a video with a picture, ready for sites that only take video.
or drop them here, or paste them
Nothing is uploaded.
About MP3 to MP4
YouTube, Instagram, TikTok and many slide and messaging apps accept video but not plain audio. To share a song, a podcast episode, a recording of a talk or a voice message there, it needs to be an MP4. This converter makes one: your sound, with a still picture on screen.
Choose a picture, such as cover art, a photo or a title card, in JPG, PNG or WebP. It is shown for the whole length of the video, at up to 1280 pixels on its longest side. Without a picture, the video shows the cover art saved in the MP3, if it has one, or else a plain dark background.
The MP3 sound goes into the MP4 exactly as it is, without being decoded and encoded again, so it loses no quality and conversion is quick, even for an hour-long recording. The picture becomes H.264 video, which keeps the file small because a still image needs very little data.
Everything happens in your browser: the sound and the picture never leave your device. Video encoding needs a reasonably recent browser; if yours can't do it, the page tells you before anything is converted.
Questions and answers
Yes. The MP4 uses H.264 video and MP3 sound, which YouTube and most other sites accept.
No. The MP3 sound is copied into the MP4 exactly as it is.
For YouTube, a 16:9 picture such as 1280 by 720 pixels fills the screen. Square cover art works too; it is shown with its own shape.
Yes, when you don't add a picture of your own: the video shows the cover art saved in the MP3. A picture you add takes its place.