PenCast
PenCast helps newsletter creators turn written posts into podcast-ready audio for public or paid subscriber feeds.
2 sources: Replit export, live link
What they built
PenCast turns newsletter posts into narrated audio editions for newsletter creators, especially people publishing on Substack. It can import written content, generate audio, and publish it as a podcast feed to places like Apple Podcasts and Spotify. It also supports private subscriber feeds for creators who want to offer paid audio access.
Core features
4 features on screen. Each one is a thing PenCast does.
Convert Substacks into Podcasts
Start turning newsletter posts into narrated audio, see how it works, or listen to a sample
Podcast dashboard
Track episode status, review recent audio posts, and start a new episode. You can see what is published, failed, or still in progress
Voice and feed settings
Choose the default narration voice, manage your cloned voice, and connect an RSS feed to auto-publish new newsletter posts as podcast episodes
Create audio episode
Paste a post, import it from a URL, or upload a file, then add the title, description, and voice to create a narrated episode
How it was built
Built on Replit: 5 weeks from late February to late March 2026, with 143 commits along the way.
23 February to 30 March 2026. 143 commits across 3 active weeks. The busiest was the week of 1 March, with 76. 159 files of TypeScript, JavaScript and CSS. Replit keeps the chat, so this run's conversations are not on this page.
Read from the Replit export the builder uploaded.
- 3 weeks
- active weeks
- 6 months ago
- last push