Handlebars.js — The Open Source Library

GPTWeb's templating syntax is powered by Handlebars.js — a widely adopted, open source JavaScript templating library. It builds on the original Mustache templating spec and extends it with helpers, partials, and block expressions like {{#if}} and {{#unless}}. Here are a few quick facts about Handlebars.js:

It's a battle-tested, well-documented library with a massive community — which means GPTWeb's templating approach is both familiar to developers and reliable in production. You can learn more at handlebarsjs.com. GPTWeb layers its own token conventions and AI-specific extensions on top of Handlebars, giving the platform a powerful and flexible foundation for personalization across welcome messages, email campaigns, agent workflows, and more. Want to explore more about how GPTWeb works or jump into getting started?

GPTWeb is the future of engagement — websites and marketing automation combined, built for the AI era, built for now.