Podcast to Newsletter
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- MP3 · WAV · M4A · MP4 — jusqu’à 1 Go
- Plus de 60 langues
- ~3 min par heure d’audio
- 6 formats d’export
Adopté par plus de 100 000 podcasteurs et créateurs Privé et sécurisé — vos fichiers restent les vôtres
Turn your latest episode into this week’s newsletter
Turn any podcast episode into a ready-to-send newsletter. Paste a link or upload the audio and Castmagic transcribes it, then drafts the whole issue in your voice — hook, takeaways, and pull-quotes — in minutes.
Stop letting great episodes die in the feed
You spend an hour on a great conversation, and it reaches the people already subscribed to the show. Your newsletter — where your most engaged audience actually reads you — goes out late or not at all, because turning an episode into a written issue means re-listening, hunting for quotes, and writing from a blank page.
Castmagic closes that gap. Drop in the episode and it comes back transcribed, then drafted into a newsletter: an opening hook, the key takeaways, the sharpest quotes pulled word-for-word, and a clear call to action — laid out the way you actually send, ready to edit instead of write.
Your newsletter is your highest-intent channel — feed it
Podcast listeners are passive; newsletter subscribers raised their hand and gave you an inbox. That’s where launches convert, sponsors see value, and replies start conversations. The problem is supply: writing an original issue every week is its own job, so the newsletter is usually the first thing that slips.
Repurposing the episode fixes that without adding production. The recording you already made becomes the issue — same ideas, same guest, same quotes — reformatted for people who would rather read for five minutes than listen for sixty.
It sounds like you, because it’s built from your words
This isn’t a generic AI summary. Castmagic drafts from the verbatim transcript, so the takeaways and quotes are things actually said on the episode. Give it a prompt with your structure and tone — short paragraphs, one big idea, your sign-off — and save it as a recurring step so every issue comes out consistent.
You stay the editor. The draft kills the blank page and the busywork; you tighten the hook, add your links, and hit send.
One episode, a week of content
The newsletter is the anchor, but the same recording is a content multiplier. In one pass, Castmagic can also draft a blog post, a LinkedIn post, an X thread, show notes, and pull short clips — so one hour of recording fills the whole week across every channel.
When you want to go bigger than a single episode — a lead magnet built from your best conversations — connect your library to Claude at castmagic.io/claude and work across the entire back-catalog at once.
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How to turn a podcast into a newsletter
Add your podcast episode
Paste a link to your podcast episode — a podcast feed, YouTube, Zoom, cloud storage — or drag the file straight into the uploader. Audio and video are both fine.
Castmagic transcribes it
Transcription runs in minutes — 60+ languages with auto-detect, speaker labels, and word-level timestamps — so the draft is built from exactly what was said, not a rough summary.
Draft your newsletter
Pick the newsletter preset, or write your own prompt, and Castmagic drafts it from the recording — structured and ready to edit in your voice, not a wall of transcript.
Bien plus qu’un simple outil de transcription
| Dimension | Outil de transcription classique | Castmagic |
|---|---|---|
| Ce que vous obtenez | Un fichier texte | Une transcription horodatée avec identification des intervenants — plus des résumés, notes d’épisode et publications rédigés par l’IA à partir du même envoi |
| Langues et traduction | Transcription seule, souvent anglocentrée | Plus de 60 langues de transcription ; traduisez toute transcription en 11 langues, horodatage et intervenants préservés |
| Formats d’export | TXT, parfois SRT | TXT, SRT, VTT, PDF, DOCX et CSV — chaque format, chaque langue, un seul menu |
| Après la transcription | Débrouillez-vous | Interrogez Magic Chat sur l’enregistrement, cherchez dans toute votre bibliothèque et générez du contenu avec les modèles IA |
Make it yours
Refine the draft in the editor: sharpen the hook, adjust the tone, and drop in your links and CTA. Save the prompt as a recurring step so every future episode comes out the same way.
Podcast to Newsletter & Content
Publish or schedule it
Copy the finished newsletter into your newsletter tool, CMS, or scheduler, or export it. From one recording you can ship several formats at once.
Clips & Podcast to Newsletter
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Zapier Professional Creators Love Castmagic
Castmagic is just a great product. When it came to creating content around The Calum Johnson Show it made our life a lot easier. Highly recommend
Frequently Asked Questions
Last updated June 2026 by the Castmagic team
How do I turn a podcast episode into newsletter?
Add your podcast episode to Castmagic — paste a link or upload the file — it transcribes in minutes. Then choose the newsletter preset (or your own prompt) and Castmagic drafts it from the recording, in your voice. Edit it, drop in your links, and publish. The whole loop takes a few minutes instead of an afternoon.
Will the newsletter sound like me?
Yes — that's the point. Castmagic drafts from your actual words, and you can give it a custom prompt with your tone, structure, and rules (no hashtags, short sentences, your sign-off). Save it as a recurring prompt and every episode comes out on-brand. You stay the editor; it removes the blank page.
Can I repurpose my whole back-catalog at once?
For a single recording, the Castmagic app is the fastest path. When you want to work across your entire library at once — a lead magnet from your best episodes, a book, a course — connect Castmagic to Claude with the MCP connector and Claude can search and build from every recording you have. See castmagic.io/claude.
How accurate is the transcription it builds from?
Castmagic uses state-of-the-art speech models with 60+ languages, automatic language detection, and speaker labeling. Clear audio typically transcribes well above 95% accuracy, and a custom-vocabulary list keeps names, products, and jargon spelled right — so the content is built on a clean source.
Is it free to try?
Castmagic has a free tier so you can run a StreamYard recording through the full workflow and see the output. Higher volume — more recordings per week, longer files, and unlimited content generation — is on the paid plans.
What does the newsletter draft include?
By default you get a subject-line-ready hook, a short intro, the episode’s key takeaways, two or three pull-quotes lifted verbatim, and a closing call to action. It’s a starting structure, not a fixed template — adjust the prompt to match how your newsletter is laid out and it follows your format every time.
Can I use this with Beehiiv, Substack, or ConvertKit?
Yes. Castmagic gives you a clean, formatted draft you can paste straight into Beehiiv, Substack, ConvertKit/Kit, Mailchimp, or any editor — the structure holds up. We also have dedicated pages for turning a podcast into a Beehiiv newsletter and a Substack newsletter if that’s your platform.
How long can the episode be?
Full-length episodes are fine — Castmagic handles multi-hour recordings, and longer conversations usually make richer issues because there’s more to pull from. A typical hour transcribes in a few minutes, with speaker labels and timestamps so the right quotes are easy to find.
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