OneTaskBy Tim King · Updated
Waveform Video
Audiogram Video With Animated Sound Bars or a Waveform Line Over Cover Art
OneTask is free, with no sign-up, and built by one person.
If this tool saved you time, a coffee helps keep new ones coming.
How the Waveform Video works
This waveform video maker turns an audio clip into an audiogram: cover art, a title, and bars or a line that move with the sound, plus a progress bar along the bottom. Drop the clip and an optional picture, choose a style and size, and press Render. It is all done in your browser.
Audio does not travel on social media. A podcast clip posted as a still image is easy to scroll past, and most feeds play muted. An audiogram gives the eye something moving while signalling that there is sound worth turning on.
How the waveform video is drawn
The clip plays through your browser's Web Audio engine. An analyser node takes 2048 samples at a time and reports them 30 times a second. Bars show the frequency spectrum, with low notes on the left and highs on the right on a curved scale, so speech fills the width rather than bunching up. Line draws the raw waveform, the shape of the sound pressure itself. The picture, title and wave are painted on a canvas and recorded along with the audio.
| Platform | Frame | Clip length |
|---|---|---|
| Instagram feed, LinkedIn, X | 1080 × 1080 or 1080 × 1350 | 30–60 s |
| Reels, TikTok, Shorts, Stories | 1080 × 1920 | 15–60 s |
| YouTube, websites | 1920 × 1080 | Up to 5 min |
Tips and pitfalls
Cut the clip first. The strongest audiograms are one quote or hook of 20 to 60 seconds. Trim the audio before you start; the render runs in real time and the tool accepts up to 5 minutes.
Speech versus music. Bars suit music and lively speech. Line looks calmer and suits interviews and narration.
Contrast. Pick a wave colour that stands out from the background. White on a dark colour reads on every screen.
Captions. Muted viewers still miss the words. Burn subtitles into the result with the subtitle burner if you have a transcript.
How to read the result
The stats show the audio length, wave style, frame size and file size.
FAQ
What is an audiogram?
An audiogram is a short video made from an audio clip, usually showing cover art, a title and an animated waveform. Podcasters and musicians use them to share clips on social networks that do not support audio posts or that autoplay without sound.
How long should a podcast audiogram be?
Between 20 and 60 seconds works best for most feeds. Choose one complete thought or quote that makes sense on its own. Longer clips lose viewers, and Stories cut off anything over 60 seconds per card.
Why does my waveform look flat?
Quiet recordings move the bars less. Normalise or boost the clip in an audio editor before making the video. Very bassy music may also bunch on the left; the Line style shows level more evenly.
Is my audio uploaded to make the audiogram?
No. The clip is analysed and recorded by your browser, and the picture is drawn on your device. Nothing is sent to a server, so unreleased episodes and tracks stay private throughout.
See also: all Video & Screen tools, Images, Audio, PDF, SVG, Simulations & Screensavers, Generative Art, Chart Makers, 3D Model Viewers, Drawing Pads, Mockups & 3D Making, Diagram Makers, 3D Science, Tracker Music.
Related tools
Audio To Video
Put a still image behind an audio file to make an uploadable video.
Music Visualiser
Bars, waveform or circle driven by your microphone; fullscreen.
Spectrogram
Turn any audio file into a spectrogram image, time against frequency.
Podcast Clip Cutter
Cut a podcast clip, fade it, and normalise it for social.
Slideshow Maker
Photos plus an optional song become a slideshow video with fades.