What is HTML Viewer?
An HTML Viewer renders HTML code in a safe, sandboxed preview. It sanitizes content—removing scripts, iframes, and dangerous attributes—so you can view HTML from any source without security risks. Perfect for inspecting markup from emails, scraped pages, or third-party exports.
Use it to preview HTML before deployment, analyze document structure, test responsive layouts, or verify how content will look. The viewer preserves CSS styling, images, and layout while blocking executable content. No code runs on your machine; everything is rendered securely in the browser.
Export the sanitized HTML or a PDF snapshot of the rendered view for documentation, archiving, or sharing. Ideal for developers, designers, and content teams who need to safely preview untrusted HTML.
How to Use HTML Viewer
- Paste or upload HTML: Paste your HTML into the input editor or upload an .html or .htm file. The tool accepts full documents, fragments, or embedded styles.
- View the live preview: The viewer renders your HTML in real time with full CSS support. Structure, styling, and images are preserved. Scripts and iframes are removed for security.
- Toggle preview and source: Switch between Rendered view (how it looks) and Source view (the HTML code) to inspect structure or debug layout issues.
- Export or download: Download the sanitized HTML (safe for reuse) or export the rendered view as a PDF for sharing or documentation.
No signup required. Works on desktop and mobile.
Frequently Asked Questions
Is it safe to view HTML with this tool?
Yes. The viewer sanitizes content before rendering, removing scripts, event handlers, iframes, and unsafe attributes. You can safely paste HTML from unknown sources without risk of XSS or malicious code execution.
What HTML elements are supported?
Standard HTML5 elements are supported: headings, paragraphs, lists, tables, forms, images, links, and semantic elements. Scripts, iframes, object, embed, and similar elements are filtered out for security.
Can I export the viewed content?
Yes. Export as sanitized HTML (cleaned markup, safe to reuse) or as a PDF of the rendered view. The PDF captures the visual result including styling and layout.
Why use a viewer instead of opening HTML in a browser?
Opening untrusted HTML files directly can run scripts and pose security risks. The viewer renders content in a sandbox, so you get a safe preview without executing any code. It's ideal for inspecting external or user-submitted HTML.