Free Substack tools

Post image generator

Turn an X, LinkedIn, Threads or Substack post into a quote card, carousel or thread image, in every size, Pinterest and LinkedIn included.

DesignXLinkedIn

Substack to social posts

Turn a Substack post into Notes and posts for LinkedIn, X, Threads, Bluesky, Mastodon and Facebook, free.

MarketingSubstackLinkedIn

Engagement rate calculator

Any account's engagement rate by followers and by views, from a username or a link, against benchmarks for its size.

Social mediaInstagramTikTok

Substack MCP server & CLI

Draft posts, publish Notes and check your stats on Substack from Claude, Codex or Cursor.

MCP-servers en CLI'sSubstack

Substack money calculator

What your paid subscribers earn after Substack's 10% and Stripe's fees.

Viral hook generator

10 viral hooks for any topic, each shaped like a real post that got 3 times its creator's usual likes. Free.

MarketingLinkedInX

Substack bio generator

Your Substack bio in the shapes the best Substack writers use, graded against them.

Social mediaSubstack