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EasyCast Studio
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Free tool · Browser-only · No upload, no signup

The podcast audiogram preview, in one drop.

Drop in any audio file and see a brand-ready audiogram preview render in seconds. The waveform is real — pulled from your samples, not animated from a template. Download a 1080×1080 PNG snapshot. Your audio never leaves your device.

MP3 · M4A · WAV · OGG · WebM · 50MB max · No upload

How it works

Step 1

Pick a clip

Drop any podcast or voice file into the panel. We use the first 30 seconds — the part that has to land for an audiogram to convert.

Step 2

Add a title

Type the episode title and your show name. They overlay on the audiogram so the visual is brand-clear at a glance.

Step 3

Preview + download

See the live waveform play in time with your audio. Download a 1080×1080 PNG snapshot of the current frame. No upload, no signup, no watermark.

Why this works

Browser-only — your audio never leaves your device

The whole pipeline runs in your browser via the Web Audio API. The file you pick is decoded and rendered locally. We don't upload it. We don't store it. There's no server in the loop.

Designed for the share, not for the editor

Most audiogram tools dump you in a 30-control timeline editor. This is the opposite: pick a file, see the visual, ship it. The full editor lives at /tools/audiogram if you want frame-perfect control and an MP4 export.

Real waveform, not a fake animation

The bars come from the actual audio samples. They peak where the speaker emphasises, dip in the pauses, and read like the sound looks. That's why audiograms work — eye and ear track the same moment.

Frequently asked

What does this tool actually output?
A 1080×1080 (Instagram square) PNG snapshot of the current frame of your audiogram preview, with title and show name overlaid on the waveform. The audio plays in the browser so you can scrub to the snapshot you want, then download. No watermark.
Can I export an MP4 of the playing audiogram?
Not in this free version. Browser MP4 encoding is heavy and unreliable across devices, so we kept this tool snapshot-only. The full audiogram studio at /tools/audiogram exports MP4 with frame-perfect timing, captions, animations, and brand kits — that's the upgrade path.
How long can my clip be?
You can pick any audio file up to about 50MB. The preview uses the first 30 seconds — the part that has to do the work in any social-share audiogram.
Do you upload my file?
No. Decoding, waveform extraction, rendering, and snapshot generation all happen in your browser via the Web Audio API and Canvas. The file never touches our servers.
Which audio formats work?
Whatever your browser supports natively — typically MP3, M4A, WAV, OGG, and WebM. If your browser refuses a file, re-export to MP3 or WAV and try again.
Will it work on mobile?
Yes, modern Safari (iOS 15+) and Chrome (Android) both support the Web Audio API and Canvas APIs needed. Tap the file picker, choose your clip, and tap Play. The PNG download saves to your camera roll.

Next step

Take the clip into the full repurposing workflow

A visual preview is the first asset. Editing, captions, transcripts, and publishing decide whether clips turn into growth.

AI podcast editingTurn clips into a repeatable editing workflow with cleanup, show notes, summaries, and social assets.Read the guidePodcast transcriptionAdd searchable transcripts and captions so clips, quotes, and episodes are easier to repurpose.Read the guideBest podcast recording softwareCompare tools when the share workflow needs recording, editing, and publishing in one stack.Read the guide

Need an MP4, captions, brand kits, or a 9:16 cut?

The full audiogram studio is one signup away.

EasyCast Studio’s audiogram tool exports MP4 with frame-perfect captions, 9:16 / 1:1 / 16:9 cuts, brand-kit colors, and a one-click share to social. Free to start.

Try the full audiogram studioSee all free tools