MP3 to MP4 Converter — Free Online Audio to Video

Now turn that track into a music video

One More Shot AI generates a professional, beat-synced music video from your song in minutes — with AI lip-sync, dozens of styles, and formats for YouTube, TikTok, and Reels. Your first video is free.

Get a real music video instead — free

No credit card required • HD quality • No watermarks

Convert MP3 to MP4 online — free and private

This converter turns any audio file into an MP4 video by pairing your track with a cover image. Unlike most online converters, nothing is uploaded: the conversion runs inside your browser using WebAssembly, which means it's fast, private, and works even with large files. Pick 16:9 for YouTube, 9:16 for TikTok and Instagram Reels, or 1:1 for feed posts.

Why turn audio into video?

YouTube is the world's biggest music discovery platform, but it only accepts video. The same goes for TikTok, Reels, and Shorts. Converting your MP3 to MP4 with cover art is the minimum viable way to get your music on those platforms — every musician, podcaster, and beatmaker needs it at some point.

Static image vs. a real music video

A static cover gets your track online, but it won't stop a scroll. Videos with motion get dramatically more engagement — YouTube's algorithm favors watch time, and TikTok is built entirely on visual hooks. When you're ready to upgrade from a static image, One More Shot AI generates a full music video from the same audio file: AI-directed scenes, beat-synced cuts, and optional lip-sync, in minutes. The first one is free.

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FAQ

Frequently asked questions

Everything you need to know about creating AI music videos.

How do I convert MP3 to MP4?

Drop your MP3 (or WAV, M4A, FLAC) into the converter above, optionally add a cover image, choose the format, and hit Convert. The tool renders an MP4 video of your audio with the image as the visual — entirely in your browser, so your files are never uploaded anywhere.

Why convert MP3 to MP4?

Platforms like YouTube, Instagram, and TikTok only accept video. Converting your audio to MP4 with a static cover image is the fastest way to publish a song, podcast episode, or beat on video platforms.

Is this MP3 to MP4 converter free? Does it add a watermark?

It is 100% free with no watermark, no signup, and no file limits. Conversion runs locally via WebAssembly (ffmpeg.wasm), so we never see or store your files.

What image formats can I use for the cover?

JPG, PNG, and WebP all work. For YouTube use a 16:9 image (1920×1080); for TikTok and Reels use 9:16 (1080×1920); square 1:1 works everywhere else. If you skip the image, the video uses a black background with your filename.

Can I get a real music video instead of a static image?

Yes — that’s exactly what One More Shot AI does. Instead of a static cover, our AI generates a full music video with scenes, transitions, and effects synced to your song’s beat. Your first video is free.