HTML vs JSX

Differences, use cases, and when to use each

Last updated: April 6, 2026

HTML is the standard markup language for web pages. JSX is a JavaScript syntax extension for React that looks like HTML but compiles to JavaScript function calls. Converting HTML to JSX requires several syntax changes.

Quick Comparison

Feature	HTML	JSX
Class Attribute	class="name"	className="name"
For Attribute	for="id"	htmlFor="id"
Style Attribute	style="color: red"	style={{ color: 'red' }}
Self-closing Tags	Optional (<img>)	Required (<img />)
Event Handlers	onclick="fn()"	onClick={fn}
Expressions	Template strings	Curly braces {expression}

When to Use Each

When to Use HTML

Use HTML for static web pages, email templates, server-rendered content, and any context not using React or a JSX-compatible framework.

When to Use JSX

Use JSX when building React (or Preact, SolidJS) components. JSX enables component composition, TypeScript type checking, and dynamic expressions within the template.

Pros & Cons

HTML

Universal browser support

No build step required

Email compatible

No component model

Limited dynamic rendering

JSX

Component composition

TypeScript support

Dynamic expressions

Full JavaScript power

Requires build tooling (Babel/TS)

Different attribute names from HTML

Verdict

HTML for static content and non-React projects. JSX for React applications. The conversion is mechanical — changing class→className, for→htmlFor, and adjusting self-closing tags.

Key Takeaways: HTML vs JSX

Choosing between HTML and JSX depends on your specific requirements, not on which format is “better” in absolute terms. Both exist because they solve different problems well. In professional projects, you will often use both — the key is understanding which context calls for which tool.

If you are starting a new project and have flexibility in choosing your data format or tool, consider your team's familiarity, your ecosystem requirements, and the long-term maintenance implications. The comparison table and pros/cons above should help you make an informed decision for your specific situation.

Switching Between HTML and JSX

If you need to convert or migrate between HTML and JSX, our tools can help. Use the interactive tools linked below to convert data formats instantly in your browser, or explore the code examples in our language-specific guides for programmatic conversion in your preferred language.

When migrating a project from one to the other, start with a small subset of your data, validate the output thoroughly, and then automate the full conversion. Always keep a backup of your original data until you have verified the migration is complete and correct.

Try the Tools

HTML to JSX

Frequently Asked Questions

Can I use HTML in React without JSX?

Technically yes using React.createElement(), but it's extremely verbose. JSX is syntactic sugar that makes React code readable. Virtually all React projects use JSX.

What are the most common mistakes when converting HTML to JSX?

The top errors are forgetting to change class to className, for to htmlFor, inline style strings to objects, and not self-closing tags like <img />, <br />, and <input />. Automated HTML-to-JSX converters handle these reliably.

Can JSX be used outside of React?

Yes. Preact, SolidJS, and Inferno all use JSX with their own rendering engines. Vue supports JSX as an alternative to templates. JSX is a syntax extension, not a React-specific feature — it compiles to function calls defined by whatever framework you configure.

How does JSX handle conditional rendering compared to HTML template languages?

JSX uses JavaScript expressions directly: ternary operators ({condition ? <A/> : <B/>}), logical AND ({show && <A/>}), or inline functions. HTML template languages like Handlebars or EJS use special directives ({{#if}}). JSX's approach is more powerful but can reduce readability for complex conditions.

Does converting HTML email templates to JSX make sense?

Generally no. Email clients don't render JSX — they need raw HTML with inline styles. If you use React for email generation (react-email, mjml-react), JSX is compiled to HTML at build time. But the final email output must always be plain HTML for compatibility with email clients.

How do dangerouslySetInnerHTML in JSX and innerHTML in HTML differ?

They do the same thing — inject raw HTML — but React's naming is intentionally alarming to discourage its use. Both create XSS vulnerabilities if the HTML contains user input. Always sanitize HTML with a library like DOMPurify before using either approach.

Related Comparisons

Markdown vs HTML

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Reviewed by

Tamanna Tasnim

Senior Full Stack Developer

ToolsContainerDhaka, Bangladesh5+ years experiencetasnim@toolscontainer.com www.toolscontainer.com

Full-stack developer with deep expertise in data formats, APIs, and developer tooling. Writes in-depth technical comparisons and conversion guides backed by hands-on engineering experience across modern web stacks.

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