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Turn audio into a video

Put a song, a podcast episode or a voice note on a still picture, ready for YouTube or social apps. Made on this device.

Makes a video from a song, podcast or voice note and a cover picture, in 16:9, square or 9:16. It is free, needs no account and adds no watermark, and your files are not uploaded: everything runs in your browser on your device. The size limit is your device’s memory, and phones hold less; give the page a short while after one visit to save itself for offline use, and then it works offline.

Drop a sound file and a pictureor click to choose files. Batches welcome.
    Details

    Add a picture (album cover, photo, logo) with the sound, or leave it out for a plain background with the title. Several sound files make one video each. Wide suits YouTube; tall suits Shorts, Reels and TikTok.

    Working…

    Done

    Your files are processed on this device and never sent to a server. Reload the page to clear everything from memory.

    How it works

    1. Drop a sound file (MP3, WAV, M4A, FLAC or OGG) and a picture such as the album cover, or tap to pick them. Without a picture, the video shows the title on a plain background.
    2. Choose the shape: 16:9 for YouTube, square for feeds, or 9:16 for Shorts, Reels and TikTok. The picture is shown whole, over a blurred copy of itself or plain black or white.
    3. Make the video. It is written as an MP4 in your browser and downloads when it is ready.

    In your browser, not on a server

    Your browser decodes the sound into plain samples, draws the picture once onto a canvas (fitted whole over a blurred copy, or the title on a plain colour), and its own WebCodecs encoders write that still frame once a second with the sound as AAC or Opus. Mediabunny (MPL-2.0) packs them into an MP4.

    Compared with upload-based tools: Online MP3-to-video converters upload your music and cover art, add their logo to free videos, and cap the length. Unreleased tracks and private recordings stay private here: nothing leaves your device.

    Verify it yourself. Give the page a short while after one visit to save itself for offline use, then turn off Wi-Fi or switch to airplane mode and run the tool again. Or open your browser's developer tools (F12, or Cmd-Option-I on a Mac), pick the Network tab, and watch it while you convert. The panel above does the same count for you.

    Questions

    Are my files uploaded?

    No. Your browser decodes the sound and writes the video with its own encoders, in this tab. There is no size or length limit and no watermark, and your files are not uploaded.

    Why is the video file so small?

    The picture does not change, so the video part is a single still frame repeated once a second, which costs almost nothing. Nearly all of the file is the sound, encoded with a target of up to 192 kbps.

    Can I make videos for a whole album at once?

    Yes. Drop all the tracks and one cover picture: each track becomes its own video with the same picture.

    Will YouTube accept it?

    Yes. It is a standard MP4 at 1920×1080 (or 1080×1080, or 1080×1920 for Shorts). In Chrome, Edge and Safari the picture is H.264 and the sound AAC, which play everywhere.

    More video and audio tools

    Compress audio

    Shrink recordings, podcasts and songs to send or store. Done on this device, never uploaded.

    Pitch and speed changer

    Change the key of a song, or play it faster or slower, keeping the other the same. Done on this device.

    BPM and key finder

    Drop an audio file and read its tempo, key and Camelot code. The song is analysed on this device.

    Online tuner

    Play a note and see how sharp or flat it is. Guitar, bass, ukulele, violin or chromatic, with the sound kept in your tab.

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