Pug
Pug: A flexible JavaScript template engine for server-side and client-side rendering. Ranked #23 of 65 in Template Engine Software by our editors (7.3/10); pricing: Free plan; best for javaScript teams building templates for Express.
At a glance
- Editor score7.3 / 10
- PricingFree plan
- Best forJavaScript teams building templates for Express
- Free planYes
- Paid fromFree
- Rendering modeBoth
- Facts checked23 Oct 2026
Where it wins
- Compiles templates into reusable JavaScript rendering functions
- Supports inheritance, includes, loops, and conditional logic
- Works with Express and supports client-side compilation
Where it doesn't
- Unescaped interpolation can place values into output without escaping
- Template authoring uses a distinct indentation-based syntax
- Support is through documentation and community channels
Our verdict on Pug
Pug is an open-source template engine for JavaScript, Node.js, and browsers. Developers write HTML-oriented templates with indentation-based syntax, then compile or render them with data to produce HTML. It suits JavaScript teams that want reusable templates for server-side rendering, client-side use, or Express views, rather than teams seeking a hosted visual editor or subscription service.
Its main strength is the range of composition tools in one template language: blocks and extends enable inheritance, includes bring in Pug or plain-text files, and mixins can be reused. Templates also support JavaScript expressions, conditionals, and loops. Pug can compile source into reusable JavaScript rendering functions, including functions for client-side use, and offers both escaped and unescaped interpolation. That flexibility supports varied rendering needs, though teams should choose interpolation carefully when values enter rendered output.
Pug is distributed as open-source software, with documentation and community support rather than a paid service tier. Its fit is strongest for teams already comfortable with JavaScript and willing to adopt an indentation-based syntax; it can serve solo developers through enterprise teams, but it remains a template library rather than a broader application platform. Choose it when reusable templates, inheritance, and Express integration matter. Teams that need a hosted authoring workflow or prefer not to work in a distinct template syntax should consider a different approach.
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Pug pricing
Pug fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Rendering mode | Both |
| Syntax model | Logic-based |
| Template inheritance | Yes |
| Automatic escaping | Yes |
| Sandbox mode | Not verified |
| Async rendering | Not verified |
| License model | Open-source |
| Deployment | Cloud |
| Platforms | Web, Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 1 integrations: Express |
| Pricing | Free plan |
| Website | pugjs.org |
| Facts checked | 23 Oct 2026 |
Pug integrations
Pug lists 1 integrations on its own site.
- Express
Alternatives to Pug
- JinjaJinja gives Python applications inheritance, configurable rendering, and compilation in an open-source engine.9.4
- TwigA free, open-source PHP engine for compiled templates, inheritance, escaping, and sandboxing.9.3
- Handlebars.jsA free, open-source template engine for JavaScript projects that need reusable HTML.9.2
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Pug is listed in our Template Engine Software directory. Add the badge to your site — it links back to this page.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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