Free Audiogram Generator and Maker for Podcasts

An audiogram generator turns a podcast or audio clip into a short video with an animated waveform that moves to the sound, plus captions of what is being said. With the EchoWave audiogram maker you upload audio, pick a template, let AI auto-generate captions, then export an MP4 sized for any platform. This free audiogram creator is browser-based and needs no account to get started.

What is a podcast audiogram?

A podcast audiogram is a short video built from a slice of an episode. It pairs an animated waveform that pulses to the audio with on-screen captions of what is being said, usually over a still background, your cover art, or your logo. The point is simple: audio cannot be previewed in a social feed, so an audiogram for podcast promotion turns it into something visual that auto-plays and stops the scroll.

Worth clearing up early: this is not the hearing-test audiogram. In audiology, an audiogram is a chart that maps a person's hearing across frequencies, which is a completely separate thing. Everywhere on this page, and across the EchoWave audiogram generator, an audiogram means the podcast promo video: a captioned waveform clip, not a medical result.

Podcasters reach for an audiogram generator because static cover art gets scrolled past, while a moving waveform with readable captions earns a second of attention. A good 30 to 60 second clip gives a potential listener a real taste of an episode, a sharp quote, a funny exchange, a hot take, and a clear reason to go press play on the full show. It is one of the cheapest, highest-converting ways to promote a podcast, which is why many creators make a fresh audiogram for every episode they publish. If you want podcast audiogram examples to model, look at the shows you already follow: most lead with a single strong line, keep captions large, and stamp the clip with their logo.

AI auto captions and transcription

Most people watch social video on mute, so captions are what make an audiogram work. As an AI audiogram generator, EchoWave automatically transcribes your uploaded audio and turns it into on-screen captions that appear in time with the waveform, so you do not have to type a word. This is the same AI audiogram workflow podcasters look for when they search for an audiogram AI tool, only here it runs free in the browser.

The transcription is fully editable. You can correct a name, drop filler words, adjust the wording, or nudge the timing before you export. Captions also make your audiogram far more accessible: they reach deaf and hard-of-hearing viewers, and anyone scrolling in a noisy place or with the sound off. If you would rather control every detail of the text, you can also use the subtitles tool to style, size and position captions exactly how you want them.

Templates and branding

Every audiogram should look like your show, not a stock template. The EchoWave audiogram maker ships with ready-made podcast layouts you apply in one click, then adjust so each clip stays on-brand:

• Colors. Match your podcast palette for the background, the waveform and the caption text.
• Fonts. Pick typefaces that suit your brand for titles and captions.
• Cover art. Feature your episode artwork or show logo front and centre.
• Logo and handle. Add your logo so your name travels with the clip wherever it gets reshared.

Set your branding once and reuse it across every episode so the feed stays consistent and recognisable, with no design software and nothing to install. Because the whole thing runs in the browser, your audio is processed in your own session rather than sitting on a server you cannot see.

Aspect ratios for every platform

Different platforms want different shapes, and the EchoWave audiogram generator exports in all of them so a clip fills the screen wherever you post it:

• Square (1:1), 1080x1080. The safe all-rounder for Instagram and Facebook feed posts. If you only want to export once and use it everywhere, this is the format to pick.
• Vertical (9:16), 1080x1920. Full-screen for Instagram Reels and Stories, TikTok, and YouTube Shorts.
• Landscape (16:9), 1920x1080. The classic wide format for YouTube, X (Twitter) and LinkedIn.

Choose your aspect ratio before exporting and the waveform, captions and branding all reposition to fit, so one episode becomes a clip for every channel without redoing the layout from scratch.

Waveform styles

The waveform is the heartbeat of an audiogram, the moving element that signals there is audio here and invites a tap. EchoWave gives you several styles to match your brand and mood:

• Bars. The classic equalizer look, with bars that rise and fall to the beat.
• Line. A smooth, continuous oscilloscope-style wave for a cleaner, minimal feel.
• Circle. A radial waveform that pulses outward from the centre, which works especially well in square and vertical layouts.

These are the same animations that power our music visualizer and audio waveform video generator, so if you also publish music or score you can carry one consistent visual style across spoken-word and musical content.

Supported formats, length and export quality

EchoWave accepts the audio files podcasters actually have on hand, MP3, WAV and M4A among them, so you can drop in an episode export or a recorded clip without converting it first. The export is a standard MP4 (H.264 video with AAC audio) that uploads cleanly to every major social platform and plays on any device.

On length, 30 to 60 seconds is the sweet spot for social feeds. That is long enough to land one complete idea or a strong quote, and short enough that viewers watch to the end, which is exactly what the algorithms reward. Past a couple of minutes you tend to lose people before the payoff, so trim to the single moment that earns the click rather than the whole segment. For best results, start from a clean recording: clear speech and steady levels read far better in captions and on a small phone screen than a muddy or clipped file.

Audiogram best practices that actually move the needle

After making hundreds of these, a few habits separate the clips people watch from the ones they swipe past:

• Lead with the hook. Put the most gripping line in the first three seconds, before anyone has decided to scroll on.
• Pick a self-contained clip. Choose a moment that makes sense on its own, with no missing setup or a punchline that needs context.
• Always keep captions on. Sound is off by default for most viewers, so the captions carry the message. Read them back at phone size to make sure they are legible.
• Stay on-brand. Keep colors, fonts and logo consistent so every clip is instantly recognisable as yours.
• Add a clear call to action. Tell viewers where to find the full episode and tag the show in the caption.
• Repurpose per platform. Export the same clip square, vertical and landscape so one episode feeds Reels, Shorts, TikTok and your feed.

Do this consistently and the audiogram stops being a one-off and becomes a repeatable way to grow your audience from each episode you release. EchoWave runs in any modern browser on desktop, Chrome, Edge, Safari and Firefox, so you can produce a clip from your laptop without a phone app or a download.