One newsletter. A week of social content.
Paste your issue. Get a Twitter thread, LinkedIn posts, and an Instagram carousel — each rewritten for its platform, not just copy-pasted.
No credit card required. Cancel anytime.
Platform-native, not recycled
X gets punchy line breaks. LinkedIn gets the slow-burn opener. IG gets carousel-ready chunks.
Your voice, not GPT's
Brand Voice training reads your past newsletters and matches the rhythm.
Drives readers back to email
Every post ends with a CTA you customize — most users see 2–3x signup lift.
How it works
Paste your issue URL or text
Substack, Beehiiv, ConvertKit — or just paste the content.
AI rewrites for each platform
Not just chopping it up — actual platform-native rewrites.
Schedule with one click
Copy out or push to Buffer / Hypefury / Typefully.
What you get
Every repurpose generates multiple ready-to-publish formats from a single source.
Frequently asked questions
Which newsletter platforms work?
Substack, Beehiiv, ConvertKit, Ghost, Mailchimp — anything with a public URL or pasted content.
Will the social posts feel native, not recycled?
Yes. Each platform gets its own structure, hook, and voice — not the same text copy-pasted.
Can I keep my email link in the social posts?
Every post ends with a customizable CTA — link to the issue, your signup page, or anywhere you choose.
Is this better than ChatGPT?
ChatGPT writes generic copy. PostSpark trains on your past newsletters to match your voice and includes platform-native formatting.
Try PostSpark free
10 repurposes per month, no credit card. Upgrade to Pro for unlimited generations.
Get started