Launching today
Castfy
Turn a URL into a narrated product demo
1 follower
Turn a URL into a narrated product demo
1 follower
Castfy turns a URL and a prompt into a product demo video, recorded by a browser running on your own machine — so it reaches localhost, staging, and anything behind a login.
Free
Launch Team / Built With
Render Sandboxes: a computer for every agentRun untrusted code safely. Idle sandboxes cost nothing
Promoted
I'm Yves.
Why I built Castfy:
Every time I shipped something, I spent an hour recording and editing a 2-minute demo. I already had a coding agent that could use my app, so I made it record the demo for me. Castfy cuts the waiting, zooms on every click and narrates it.
What feedback would help most:
• Did your demo explain your product clearly, or did a cut or zoom hide something important?
• If it broke: was it the agent (wrong click, got stuck) or the edit?
• Your OS and which agent you used (Claude Code, Codex or Cursor)
Free to try. I'm here all day answering everything