Hookline: a free LinkedIn writing studio

What Hookline is

Hookline is a free LinkedIn writing studio. Write posts in your own voice, get the hook past the see-more fold, check readability and AI-sounding phrases, plan a calm rhythm, post through LinkedIn's official API only when you press the button, and learn from your own analytics export.

AI is optional and runs on each user's own Anthropic API key, straight from their browser, so the key never reaches the server.

Who it's for: Professionals and founders who post on LinkedIn

What you can do

• A live feed preview cut where see more cuts
• A post check: hook length, links, hashtags, AI cliches and more
• A hook lab with 20 formulas
• Structures: story, list, opinion, how-to and more
• A calendar with reminders; it never posts on its own
• Analytics from your LinkedIn export

Questions

Is Hookline free?

Yes. AI features are optional and use your own Anthropic API key.

Does it post automatically?

No. It posts through LinkedIn's official API only when you press Post now; schedules are reminders.

Where is my API key stored?

Only in your browser. The server never sees it.

Open Hookline