High power tools for HTML, enabling modern UIs with simplicity and hypertext.
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Tracked since2026
0 reviews trackedThe Bottom Line
Entry price
Free, no paid tier
Biggest pro
Simplifies interactivity
Biggest con
Different paradigm
TL;DR - htmx
- Extends HTML with AJAX, WebSockets, and CSS Transitions via attributes.
- Enables dynamic UIs with less JavaScript and smaller codebases.
- Lightweight, dependency-free, and open-source library.
Pricing: Free forever
Best for: Individuals & startups
What is htmx?
htmx is a lightweight, dependency-free JavaScript library that allows developers to access AJAX, CSS Transitions, WebSockets, and Server Sent Events directly within HTML using attributes. It extends HTML's capabilities beyond traditional <a> and <form> elements, enabling any element to trigger HTTP requests and update parts of the page without full reloads.
This tool is designed for developers who want to build modern, dynamic user interfaces with the simplicity and power of hypertext, reducing the need for extensive JavaScript frameworks. It aims to complete HTML as a hypertext, offering a more efficient way to create interactive web applications and has been shown to significantly reduce codebase sizes compared to alternatives like React. htmx 2.x drops IE support, while 1.x remains available for legacy projects.
Available on: Web
Pros & Cons
Pros
- Simplifies interactivity
- No JavaScript needed
- Lightweight
- Progressive enhancement
- Good documentation
Cons
- Different paradigm
- Not for SPAs
- Server requirements
- Debugging different
- Smaller ecosystem
Key Features
HTML extensionsAJAX requestsCSS transitionsWebSocket supportNo JavaScript requiredServer-driven
Pricing Plans
Pricing checked May 28, 2026
Free
Free
- Full library access
- AJAX from HTML
- No build step
- 14kb minified
- BSD-2-Clause license
- Open source
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htmx FAQ
What is htmx?
htmx extends HTML with attributes for AJAX, CSS transitions, and WebSockets.
Is htmx free?
Yes, htmx is completely free and open source.
htmx vs React?
htmx works with server-rendered HTML. React is for client-side apps with more complexity.
Source: htmx.org