Unitpost

Three steps from a blank project to inbox-safe HTML. No account.

Constrained TSX. Tailwind or CSS. Inbox-safe markup. This package does not send mail.

Write email code and see the exact HTML the send engine produces — live in your browser, nothing to install.

An MIT-licensed email component library that works in Outlook, Gmail, and Apple Mail. Import Heading, Text, Button from @unitpost/email/react and call render(), or parseTsx a string if you are not using React. Pass the HTML to any sender. No Unitpost account and no API key.

For coding agents, run npx skills add unitpostcom/email — that teaches the catalog, React imports, parseTsx, render, and layouts with no account. For Node, run npm install @unitpost/email zod. zod is a peer; React is optional (only if you import @unitpost/email/react). Node 18+.

No. The package renders HTML locally and works fully offline. The playground and template gallery are also free without an account. Unitpost can send the HTML if you want a sender; any other API or SMTP relay works too.

Yes. That is the point of the library: one document, inbox-safe HTML for Outlook, Gmail, and Apple Mail. Live previews on the component reference and the playground use the same renderer as production sends.