An HTML code viewer lets you see what your HTML code looks like when it is rendered in a browser. Instead of reading through lines of markup, you can paste your code into the editor and see the result in a live preview.
ToolsViewer provides an online HTML viewer where you can work with HTML directly in your browser. You can type code, paste an existing HTML document, or import an HTML file and check the output without setting up a local development environment.
The HTML preview tool also gives you the option to work with CSS and JavaScript. In View mode, you can keep your HTML code and preview side by side. Panels mode is useful when you want separate areas for HTML, CSS, and JavaScript while making changes to a page.
The preview is displayed in a sandboxed iframe, which makes it useful for testing small pieces of code, forms, scripts, embeds, and page layouts. You can also change the preview size to see how the page looks on mobile, tablet, and desktop screens.
Step 1: Add your HTML code
Paste or write your HTML in the editor. You can also import an .html, .htm, or .txt file, load the sample code, or fetch a publicly available URL.
Step 2: Select a view
Choose View mode if you only need an HTML editor and preview. If your page also uses CSS and JavaScript, switch to Panels mode and work with all three together.
Step 3: Check the preview
Your code appears in the live preview as you edit it. Use Refresh, Zoom, and Inspect when needed. You can also select Mobile, Tablet, or Desktop widths to check the layout.
Step 4: Save or open your HTML
When you are finished, you can copy the code, download it as an .html file, or open the current preview in a separate browser tab.
View HTML code online:
Paste HTML into the editor when you want to quickly inspect the markup and see the rendered page without opening a full development environment.
Preview an HTML file:
The HTML file viewer can be useful when you have an existing .html or .htm file and want to check its content and appearance in your browser.
Test HTML and CSS:
Make small changes to your markup or styles and use the live preview to see the difference immediately.
Check responsive layouts:
Switch between Mobile, Tablet, and Desktop widths to get a quick idea of how your page behaves at different screen sizes.
Test JavaScript:
Use the JavaScript panel to try small scripts and see how they interact with your HTML in the preview.
Learn HTML:
Students and beginners can use an HTML source code viewer to experiment with markup and understand how HTML elements affect the final page.
Check landing pages and email HTML:
Preview your HTML before moving it to another platform. For dedicated email creation and testing, you can use the HTML Email Builder.
The HTML document viewer works with HTML that you enter directly or import into the editor.
.html files.htm files.txt files containing HTMLYou can download your work as an .html file or open an online HTML code preview in a separate browser tab.
Explore related tools like DOCX to HTML, HTML Compare, HTML Decoder, and HTML Email Builder to convert, compare, decode, and edit HTML online.