Online HTML Viewer

Simple, fast, and real-time HTML preview

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Online HTML Viewer is a web-based tool that allows users to instantly write, edit, and preview HTML and CSS code. It features a split-screen layout, real-time live preview, syntax highlighting, and auto-completion to enhance the coding experience. No setup required just open the tool, start coding, and see the results instantly. Ideal for beginners, educators, and developers looking for a quick and easy way to test code without the need for complex software.

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Online HTML Viewer is a browser-based editor that lets you write HTML/CSS/JS and see a real-time preview instantly.

for: Beginners, educators, developers, and casual users needing quick HTML/CSS testing
pricing: free

Key features

6 features of Online HTML Viewer

Live Split-Screen Preview — Shows code on the left and updates the rendered result on the right in real time.
Syntax Highlighting & Auto-Completion — Colors code elements and suggests tags, attributes, and CSS properties as you type.
Auto-Close Tags & Error Highlights — Automatically inserts closing tags/brackets and flags potential issues.
Import/Export HTML — Load local HTML files into the editor and download edited files.
Fullscreen & Responsive Preview — Open the preview in a new tab or resize the pane to test different screen sizes.
Dark Mode & Resizable Layout — Dark theme reduces eye strain and layout panes can be dragged to adjust size.