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 Jul 5, 2026
Free
Free
- Full library access
- AJAX from HTML
- No build step
- 14kb minified
- BSD-2-Clause license
- Open source
Reviews
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htmx FAQ
How does htmx enable dynamic user interfaces without extensive JavaScript?
htmx allows developers to use HTML attributes to trigger AJAX requests, CSS Transitions, WebSockets, and Server Sent Events directly. This approach extends HTML's native capabilities, letting any element initiate HTTP requests and update parts of the page without requiring full reloads or complex JavaScript frameworks.
Which teams would benefit most from using htmx?
Teams focused on building modern, dynamic user interfaces with the simplicity and power of hypertext are well-suited for htmx. It is particularly useful for developers aiming to reduce the amount of JavaScript needed for interactive web applications.
How does htmx compare to a framework like Vue.js?
htmx aims to complete HTML as a hypertext, allowing dynamic behavior directly within HTML using attributes, whereas Vue.js is a comprehensive JavaScript framework. htmx can significantly reduce codebase sizes compared to alternatives like Vue.js by minimizing the need for extensive client-side JavaScript.
What kind of projects are not ideal for htmx?
htmx is not designed for building Single Page Applications (SPAs) and operates on a different paradigm than traditional JavaScript frameworks. It also has specific server requirements and a smaller ecosystem compared to more established client-side frameworks.
Does htmx include a free tier?
htmx is entirely free to use and does not require any paid plans. It is a dependency-free JavaScript library available for developers to integrate into their projects.
Can htmx integrate with existing HTML structures?
Yes, htmx is designed to extend HTML's capabilities by allowing any HTML element to trigger HTTP requests and update portions of the page. It works by adding attributes directly to existing HTML, simplifying the process of making static content dynamic.
Source: htmx.org