How do I turn an MP3 into a video?

Upload the audio and caption it, add a cover if you like, click Viz in the caption toolbar and pick Spectrum, Mirror or Pulse, then export an MP4 in 16:9, 9:16 or 1:1.

What can I change on the visualizer?

Choose Spectrum, Mirror or Pulse, set the opacity and color, drag the visualizer anywhere on the frame and resize it with the handle.

Can I combine the visualizer with a cover image or video?

Yes. The visualizer is drawn over the cover, and captions or karaoke highlighting sit on top of both.

What shows if I have no cover at all?

Audio-only projects get a decorative backdrop automatically, so the visualizer and captions always sit on a picture.

Is the visualizer included in the exported video?

Yes. It is rendered into the MP4 with the captions and covers, moving exactly as it does in the preview.

Does the visualizer really follow the audio?

Yes. Every style is drawn from the sound of your own track: the bars rise with the bass, the beat and the voice, and Pulse kicks on every beat. It is not a looping animation, and it goes quiet when the audio does.

Audio visualizer

Audio Visualizer for Audio-Only Videos

An MP3 has no picture. Add a visualizer that moves with your track, the beat, the bass and the voice, over a cover, and publish audio as video. What you see in the preview is what exports.

Start captioning — no credit card

underneath the neon

SpectrumMirrorPulseColor

How it works

Three steps. That's the whole thing.

Caption the audio — Upload an MP3, WAV or M4A, or import a song by link. Audio-only projects get a decorative backdrop until you add a cover.
Turn on the visualizer — Click Viz in the caption toolbar and pick Spectrum, Mirror or Pulse. Set opacity and color, then drag it where you want it and resize with the handle. It moves with your track right away.
Export — Export a 16:9, 9:16 or 1:1 MP4 with captions, cover and the visualizer, moving exactly as in the preview.

In detail

What you get

Spectrum

An equalizer: bars standing on the bottom edge, low notes on the left and high notes on the right, each rising with its part of the sound.

Mirror

Thin bars centred on a line, with the bass in the middle spreading outwards, symmetric above and below.

Pulse

A disc that kicks on every beat and shrinks between them, with a ring that breathes with the bass.

Follows your track

Every style is drawn from your audio, not a looping animation, so it rises with the beat and settles in the quiet parts. The preview is the export.

Any color

Match the visualizer to your artwork or your captions with the color picker, and set opacity so it sits over the cover without hiding it.

Drag and resize

Move the visualizer anywhere on the frame and drag the handle to change its size.

Works with covers and captions

Layer the visualizer over a cover image or video, with captions and karaoke highlighting on top.

Audio-only ready

Projects without any picture get a decorative backdrop automatically, so the export is never a blank frame.

Why it matters

Podcast episodes, voice memos, demos and instrumentals all arrive as audio, and every platform that matters wants video. A visualizer that moves with the voice or the beat gives the frame life, and together with a cover and captions the result reads as a produced clip rather than a static card.

Add covers along the scene timeline to change the picture during the episode, then export the video in vertical for Reels and Shorts or widescreen for YouTube.

Popular with podcasters clipping episodes and musicians sharing demos.

Goes well with

Related features

FAQ

Common questions

How do I turn an MP3 into a video?: Upload the audio and caption it, add a cover if you like, click Viz in the caption toolbar and pick Spectrum, Mirror or Pulse, then export an MP4 in 16:9, 9:16 or 1:1.
What can I change on the visualizer?: Choose Spectrum, Mirror or Pulse, set the opacity and color, drag the visualizer anywhere on the frame and resize it with the handle.
Can I combine the visualizer with a cover image or video?: Yes. The visualizer is drawn over the cover, and captions or karaoke highlighting sit on top of both.
What shows if I have no cover at all?: Audio-only projects get a decorative backdrop automatically, so the visualizer and captions always sit on a picture.
Is the visualizer included in the exported video?: Yes. It is rendered into the MP4 with the captions and covers, moving exactly as it does in the preview.
Does the visualizer really follow the audio?: Yes. Every style is drawn from the sound of your own track: the bars rise with the bass, the beat and the voice, and Pulse kicks on every beat. It is not a looping animation, and it goes quiet when the audio does.