HTML Viewer & Live Preview
View and preview HTML code in real time
About the HTML Viewer & Live Preview
Sometimes you just want to see what a snippet of HTML actually renders to — without spinning up a file, a server, or an editor. HTML Viewer takes your markup and shows the live result instantly, while checking that your tags are properly opened and closed.
It is handy for quick checks: previewing the HTML a CMS or email template produced, sanity-checking a block of markup pasted from a colleague, or confirming that a structure renders the way you expect before committing it. The built-in tag validation catches the most common breakage — an unclosed or mismatched tag — and tells you which one is at fault.
How to Use the HTML Viewer & Live Preview
- Paste your HTML into the "HTML Input" box.
- Click Preview to render it.
- Read the live preview of how the markup displays.
- If a tag is unclosed or mismatched, read the error that names the offending tag, fix it, and preview again; use Copy to grab your markup.
Why Use ToolForge’s HTML Viewer & Live Preview
- It renders your HTML live so you see the actual output, not a description of it.
- A tag-stack check flags unclosed or mismatched tags and names the specific tag, correctly ignoring void elements like img and br that need no closing tag.
- It works on any snippet without boilerplate — no need to wrap your markup in a full document first.
- Rendering happens locally in your browser, so nothing you paste is uploaded.
Frequently Asked Questions
Will this validate my HTML against the full standard?
It performs a practical structural check — making sure tags are opened and closed correctly and recognizing self-closing void elements — rather than a complete W3C conformance audit. It is designed to catch the common, render-breaking mistakes quickly, not to certify full spec compliance.
Which tags count as self-closing?
Void elements such as img, br, hr, input, meta, link, area, base, col, embed, source, track, and wbr do not need a closing tag, and the validator treats them accordingly so they do not trigger false "unclosed tag" errors.
Is it safe to paste any HTML here?
The markup is rendered in your own browser and nothing is uploaded, so your content stays private. Because it renders real HTML, only paste markup you trust — exactly as you would treat any code you run in your own browser.
Why does my CSS or JavaScript not apply in the preview?
The preview renders your HTML structure, so inline styles and basic markup display, but external stylesheets and scripts referenced by the snippet are not loaded. To see a fully styled result, include the relevant CSS inline within the markup you paste.
