HTML Viewer — Preview HTML Online, Live
Free HTML viewer that works on Chromebooks, iPads, and locked-down devices
Paste any HTML and see it render instantly in your browser — no signup, no install, no upload. Test HTML emails, landing pages, SVG, or debug markup with syntax highlighting, responsive preview modes, and shareable links. Because the entire viewer runs inside the browser tab, it works on school Chromebooks, work laptops, iPads, and anywhere normal websites load.
Related developer tools
View HTML on any device — Chromebook, iPad, locked-down laptops
The HTML viewer runs entirely inside the browser tab, so it works anywhere a normal website does — even when IDEs, editors, and sandbox apps are blocked.
View HTML on a school Chromebook (no install, no admin)
School-issued Chromebooks block most apps and extensions through admin policies, but they still load websites normally. Because this HTML viewer renders entirely in the browser tab, there is nothing to install, no extension to add, and no app to side-load. Open the page, paste your HTML, and see it render — same on a managed Chromebook as on any laptop. Useful for students learning web dev, teachers demonstrating HTML in class, and anyone working on a locked-down device where IDEs are not allowed.
Preview HTML on an iPad or tablet without installing an app
iPads do not run desktop IDEs and many HTML-preview apps want a paid subscription. This tool is a website — open it in Safari, Chrome, or any tablet browser, paste your markup, and preview it live. The mobile and tablet width toggles in the toolbar let you check how your HTML responds at common device sizes without rotating the tablet or resizing anything. Works the same on Android tablets and Kindle Fire.
HTML viewer unblocked on locked-down devices
Office laptops, library computers, and school Chromebooks often block code editors, sandboxes, and development tools — but they almost always allow regular websites. Because this viewer is a normal site that renders HTML in the browser, there is nothing that a firewall or content-filter would typically catch. No external scripts run, no remote rendering happens, and nothing about your HTML is uploaded. The full workflow happens in the open browser tab.
View HTML on your phone
Got an HTML snippet in an email, Slack thread, or chat and want to see what it looks like rendered? Open this viewer on your phone, paste the snippet, and preview it instantly. The mobile width toggle is the default for narrow screens. Useful when reviewing email templates from designers, debugging a layout reported by a teammate, or testing how marketing HTML renders before sending.
Works on Windows, macOS, Linux, and every modern browser
Because the viewer is a pure web app — HTML, CSS, JavaScript, and a sandboxed iframe — it runs identically on Chrome, Firefox, Safari, and Edge across every desktop operating system. There is no native build, no platform-specific download, and no version differences to worry about. Same tool, same behaviour, same shareable links wherever you open it.
What is the HTML Viewer?
The HTML Viewer is a free online HTML previewer that renders HTML code in real time, directly in your browser. Paste any markup — an email template, a landing page, a Tailwind component — and see it rendered instantly with no signup, no install, and no upload.
Unlike full code playgrounds, this tool is purpose-built for one job: rendering HTML fast. That keeps it lightweight and shareable. Your code stays in your browser, and shareable links encode the snippet directly into the URL — no backend, no storage, no tracking.
HTML Viewer features
Instant live preview
See HTML render in real time as you type — no save, no reload, no server required.
Syntax highlighting & line numbers
Powered by CodeMirror 6 with bracket matching, auto tag-closing, and folding for readable markup.
Resizable split view
Drag the divider between editor and preview to dial in the exact ratio you want.
Responsive preview modes
Switch between mobile (375px), tablet (768px), and desktop widths to test how HTML looks on any device.
Sandboxed & private
Code runs in a sandboxed iframe and never leaves your browser. Nothing is uploaded or stored.
Shareable URLs
Compress your HTML into a link with one click. Recipients see the same preview with no signup.
Common use cases
HTML email templates
Preview transactional emails, newsletters, and marketing templates before sending.
Landing pages & snippets
Test hero sections, pricing tables, or any standalone HTML block in isolation.
Responsive design checks
Verify how layouts collapse on tablet and mobile widths without resizing your browser window.
Quick prototypes
Sketch HTML ideas, share them via URL, and iterate without spinning up a project.
Learning & teaching HTML
Type, render, and tweak — perfect for students, tutorials, and onboarding new developers.
Debugging markup
Paste broken HTML and quickly see what renders, what breaks, and where to fix it.
How to preview HTML online
- Paste or type your HTML into the editor on the left.
- The preview on the right updates live as you edit (toggle off Live Preview for manual refresh).
- Switch between mobile, tablet, and desktop widths to see how the layout responds.
- Use Open to view the rendered HTML full-screen, or Share to copy a link that contains the snippet.
- Drag the divider between panels to resize the editor and preview.
HTML5 semantic tags reference
Modern HTML has dedicated tags for structure. Use these instead of generic <div> wrappers — screen readers, search engines, and accessibility tooling all rely on them.
| Tag | Purpose | Use case |
|---|---|---|
| <header> | Introductory content for a page or section (logo, title, primary nav). | Site header with logo and primary menu. |
| <nav> | A block of navigation links — major site nav, table of contents, breadcrumbs. | Primary navigation, breadcrumb trail. |
| <main> | The dominant content of the document. Should be unique per page and not nested inside other landmarks. | Wraps article content, excluding header/footer. |
| <article> | A self-contained composition that could be distributed independently. | A blog post, forum entry, or news story. |
| <section> | A thematic grouping of content, typically with its own heading. | A chapter, tab panel, or feature section. |
| <aside> | Content tangentially related to the surrounding content. | Sidebar widgets, callouts, pull quotes. |
| <footer> | Footer content for a section or page — author, copyright, related links. | Page footer with copyright and social links. |
| <figure> | Self-contained content (image, diagram, code listing) with an optional caption via <figcaption>. | Image with caption inside an article. |
| <figcaption> | Caption or legend for the contents of its parent <figure>. | Description below a chart or photo. |
| <time> | A specific period in time. Use the datetime attribute for the machine-readable form. | <time datetime="2026-05-17">May 17, 2026</time> |
| <mark> | Text highlighted for reference, like a search-term match. | Highlighted keywords in search results. |
| <details> | A native disclosure widget — collapsed by default until clicked. | Native expandable FAQ items. |
| <summary> | The clickable heading of a <details> widget. | The question line of an expandable FAQ. |
| <dialog> | A native modal dialog. Open with .showModal() and close with .close(). | Native modal without a CSS framework. |
| <picture> | Container for multiple <source> elements, letting the browser pick the best image. | Serve WebP to modern browsers, JPEG fallback to older ones. |
ARIA roles quick reference
When a native HTML element can do the job, prefer it. Use these ARIA roles only when no semantic equivalent exists.
| Role | Purpose |
|---|---|
| role="banner" | Page header / brand row. Use the <header> element instead when possible. |
| role="navigation" | Block of navigation links. Use <nav> when possible. |
| role="main" | Main content area. Use <main> when possible. |
| role="complementary" | Content that supports the main area (sidebar). Use <aside>. |
| role="contentinfo" | Page footer information. Use <footer> at the page level. |
| role="search" | Search landmark — wraps a site-search form. |
| role="form" | A form that needs a label (use aria-label or aria-labelledby). |
| role="region" | A generic landmark requiring an accessible name. |
| role="button" | Make a non-button element act as a button. Prefer <button>. |
| role="dialog" | Modal dialog. Pair with aria-modal="true". |
| role="alert" | Important time-sensitive message. Screen readers announce immediately. |
| role="status" | Advisory status message. Lower priority than role="alert". |
Common HTML entities
HTML entities encode characters that would otherwise be interpreted as markup, or that are awkward to type. Useful for <, >, &, and typographic glyphs.
| Entity | Char | Name |
|---|---|---|
| & | & | Ampersand |
| < | < | Less-than (escape in HTML text) |
| > | > | Greater-than |
| " | " | Double quote (escape in attribute values) |
| ' | ' | Apostrophe / single quote |
| | Non-breaking space | |
| © | © | Copyright |
| ® | ® | Registered trademark |
| ™ | ™ | Trademark |
| Entity | Char | Name |
|---|---|---|
| — | — | Em dash |
| – | – | En dash |
| … | … | Horizontal ellipsis |
| ← | ← | Left arrow |
| → | → | Right arrow |
| ↑ | ↑ | Up arrow |
| ↓ | ↓ | Down arrow |
| ✓ | ✓ | Check mark |
| ✗ | ✗ | Cross / X mark |
Embedding SVG inside HTML
SVG (Scalable Vector Graphics) lives natively inside HTML — no plugin, no image file needed. The viewer renders inline SVG, SVG references via <img>, and SVG inside CSS background-image.
Inline SVG
Paste an <svg> tag directly into your HTML. Inline SVG accepts CSS styling and JavaScript interaction — best for icons, illustrations, and animated graphics.
<svg width="64" height="64" viewBox="0 0 64 64" xmlns="http://www.w3.org/2000/svg"> <circle cx="32" cy="32" r="28" fill="#6366f1" /> <path d="M20 32 L28 40 L44 24" stroke="white" stroke-width="4" fill="none" /> </svg>
SVG via <img>
For static SVGs you do not need to style or animate, link them through an <img> tag like any other image. Smaller initial DOM and same browser caching as raster images.
<img src="logo.svg" alt="Company logo" width="120" height="32" />
SVG as CSS background
For decorative patterns and backgrounds, encode the SVG into a data URL and use it as a CSS background-image. The viewer renders these correctly when previewed.
<div style="background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20"><circle cx="10" cy="10" r="3" fill="%236366f1"/></svg>');"></div>Tip: If you paste an SVG file's raw contents (starting with <?xml ... ?> or <svg>) into the editor, the viewer renders it as standalone SVG. Useful for previewing icons exported from Figma or Illustrator.
Frequently Asked Questions
Common questions about the HTML viewer, supported devices, and live preview.