Toolkit · Communications
Newsletter Builder
Build a newsletter in the browser, export drop-in email HTML.
The problem
Email platform editors are slow, fight your brand, and lock the layout inside their account. Building a clean template by hand means writing table-based HTML in 2026.
How it works
A single page that runs entirely in your browser. Assemble blocks, then export HTML you can paste straight into your email platform.
Worth knowing
The persistence model is the interesting bit: the saved HTML file is the project format. Download the email with its design data embedded, and reopen it later to keep editing. There is no account, no cloud storage and nothing to lose access to.
The exported template comes in well under Constant Contact's size limit, which is the constraint that usually bites people who paste in image-heavy designs.
Using it at your organization
- Replace the brand template with your own colours and wordmark.
- The block engine is generic; the styling is the part that's specific.
- Works with any platform that accepts pasted HTML.
Stack: Single-file HTML + JavaScript · no dependencies · no backend
Licence: MIT — use, modify and redistribute freely, commercially or not.
Hosting: static files; no server required.
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