PostCast
by The Comms Stack
The Comms Stack
First-time setup · 5 minutes

Your best posts.
Your future voice.

Paste in your strongest LinkedIn posts and PostCast will analyze your writing patterns, extract your voice, and build a personal content formula — then help you generate new posts that sound exactly like you.

Anthropic API Key

Stored in your browser only · Never transmitted anywhere except Anthropic's API · Get yours at console.anthropic.com?PostCast uses Anthropic/Claude to analyze your text and make recommendations. Your API key gives PostCast access to your Anthropic/Claude account for this limited purpose. You may need to purchase API credits from Anthropic to use this tool.

Your top-performing posts
0 / 5 minimum

Start with your 5 best posts — the ones that got the most engagement or that you're most proud of. Copy and paste each one into its own box. These form the foundation of your voice profile.

Posts 6–15 help refine your voice further — they don't need to be your best ones.

Already set up? Go to PostCast →

Reading your posts
Extracting your voice, patterns, and writing style…
· Parsing your post history
· Identifying top-performing content
· Extracting voice & style patterns
· Building your post formula
· Saving voice profile
PostCast
by The Comms Stack
The Comms Stack
Your raw input
03 — Choose your post
Voice profile active
Generated from your pasted LinkedIn posts
Anthropic API Key
Stored in your browser only. Get yours at console.anthropic.com?PostCast uses Anthropic/Claude to analyze your text and make recommendations. Your API key gives PostCast access to your Anthropic/Claude account for this limited purpose. You may need to purchase API credits from Anthropic to use this tool.
Voice Profile / System Prompt
Auto-generated from your post history. Edit freely — this shapes every post.
Post variations