The story behind HTML Online Viewer — a free tool built for developers, students, and designers.
HTML Online Viewer is a free, browser-based tool designed to help developers, students, and designers quickly preview HTML code online — without installing any software or creating an account.
Our mission is simple: make it as easy as possible to write HTML and see the result instantly. Whether you're a seasoned developer debugging a snippet or a student learning the basics of web development, our tool is built with you in mind.
🚀 Fast, free, and accessible from any device. No installation. No sign-up. No limits.
HTML Online Viewer lets you paste any HTML code directly into the editor and instantly see the rendered result in a live, sandboxed preview panel. You can also preview inline CSS and JavaScript, import local HTML files from your device, export your finished work, and save reusable code snippets for future use — all in one place.
Developers — Quickly test and debug HTML, CSS, or JavaScript snippets without spinning up a local server or creating a new project file.
Students — Learn and experiment with HTML in real time. See exactly how each tag and style affects the rendered output as you type.
Designers — Prototype HTML email templates, UI components, or landing page mockups directly in the browser with zero setup.
All code rendering happens locally inside your browser using a sandboxed iframe. Your HTML code is never transmitted to our servers. We take privacy seriously and only collect minimal, anonymised usage data to improve the service. For full details, please read our Privacy Policy.
We're constantly working to improve HTML Online Viewer. If you have suggestions, found a bug, or just want to say hello, we'd love to hear from you. Reach out at support@html-online-viewer.online — we typically respond within 48 hours.