Is this MP3 to MP4 converter really free?

Yes. No signup, no watermark and no limit on the number of files. The video is made on your own device, so there is nothing for us to charge for.

Does converting reduce the audio quality?

M4A and AAC files keep their audio exactly as it is. MP3, WAV, OGG and FLAC are encoded to AAC at 256 kbps, a higher bitrate than most MP3s, so the difference is very hard to hear. YouTube, TikTok and Instagram re-encode uploads anyway.

How do I put an MP3 on YouTube?

YouTube needs a video, so convert the MP3 first: choose 16:9, add your cover art, convert and download the MP4. Then upload it in YouTube Studio like any other video and add the title, artist and lyrics in the description.

Can I convert MP3 to MP4 on my iPhone or Android phone?

Yes, it works in Safari and Chrome on phones. Tap the drop zone to pick a song from Files, convert, then tap Download MP4, or Share or save to keep it in Photos.

Is there a file size or length limit?

There is no fixed limit. A 3 to 5 minute song converts on any recent phone. Hour-long mixes need more memory, so use a computer for those.

How do I add a picture to an MP3?

Add a JPG, PNG or WebP image, or keep the cover art embedded in your MP3, which the converter picks up on its own. The picture is centered over a blurred copy of itself, so it fills 16:9, 9:16 and 1:1 without black bars.

Can I convert WAV, M4A or FLAC to MP4 too?

Yes. WAV, M4A, AAC, OGG and FLAC all work, as long as your browser can play the file.

How do I turn my song into a real music video?

This converter makes a simple video from one image or a visualizer. For AI scenes cut to the beat with lyric captions, send the song to Revid's AI music video generator with the button under your result.

Free · No signup · No watermark

MP3 to MP4 Converter

Turn an MP3 into an MP4 video right here: add your cover art or an animated waveform, choose 16:9 for YouTube, 9:16 for TikTok or 1:1 for Instagram, and download. The song never leaves your device, so it is free, private and watermark-free.

How to convert MP3 to MP4

01
Add your song
Drop an MP3, WAV, M4A, OGG or FLAC file, or tap to pick one on your phone or computer. The title, artist and cover art are read from the file when it has them.
02
Pick a look
Choose 16:9, 9:16 or 1:1, then a still image, an animated waveform or a bar visualizer. Use your cover art or a gradient, and edit the title and artist.
03
Convert and download
Press Convert to MP4. A still image video takes seconds, animated styles a little longer. Watch the preview, then download your MP4.

What you can do with the MP4

Upload a song to YouTube

YouTube only takes video files. A 16:9 MP4 with your cover art is the classic way to publish a track, a beat or a mix.

Post on TikTok, Reels and Shorts

Pick 9:16 with the waveform or bars so the video moves while your song plays.

Share on Instagram and X

1:1 fits the Instagram feed and X, where you cannot post an audio file at all.

Send a demo that plays anywhere

A video opens on every phone and in every chat app, which makes it an easy way to send a demo to your band, a label or a curator.

Supported formats

In: MP3, WAV, M4A, AAC, OGG, Opus and FLAC, plus any other audio your browser can play. Out: an MP4 with H.264 video and AAC audio, at 1920x1080, 1080x1920 or 1080x1080. M4A and AAC files keep their original audio, copied without re-encoding; other formats are encoded to AAC at 256 kbps.

Private by design

The conversion runs inside your browser with its built-in video encoder. Your song is never uploaded to a server, which is why the tool is free, has no file size cap and adds no watermark. The only limit is your device's memory: long DJ mixes convert best on a computer.

MP3 to MP4 questions

Is this MP3 to MP4 converter really free?: Yes. No signup, no watermark and no limit on the number of files. The video is made on your own device, so there is nothing for us to charge for.
Does converting reduce the audio quality?: M4A and AAC files keep their audio exactly as it is. MP3, WAV, OGG and FLAC are encoded to AAC at 256 kbps, a higher bitrate than most MP3s, so the difference is very hard to hear. YouTube, TikTok and Instagram re-encode uploads anyway.
How do I put an MP3 on YouTube?: YouTube needs a video, so convert the MP3 first: choose 16:9, add your cover art, convert and download the MP4. Then upload it in YouTube Studio like any other video and add the title, artist and lyrics in the description.
Can I convert MP3 to MP4 on my iPhone or Android phone?: Yes, it works in Safari and Chrome on phones. Tap the drop zone to pick a song from Files, convert, then tap Download MP4, or Share or save to keep it in Photos.
Is there a file size or length limit?: There is no fixed limit. A 3 to 5 minute song converts on any recent phone. Hour-long mixes need more memory, so use a computer for those.
How do I add a picture to an MP3?: Add a JPG, PNG or WebP image, or keep the cover art embedded in your MP3, which the converter picks up on its own. The picture is centered over a blurred copy of itself, so it fills 16:9, 9:16 and 1:1 without black bars.
Can I convert WAV, M4A or FLAC to MP4 too?: Yes. WAV, M4A, AAC, OGG and FLAC all work, as long as your browser can play the file.
How do I turn my song into a real music video?: This converter makes a simple video from one image or a visualizer. For AI scenes cut to the beat with lyric captions, send the song to Revid's AI music video generator with the button under your result.