# HTML Viewer With Two Way Highlight > Online HTML viewer, HTML runner, HTML test tool with real-time two-way code-element highlight. Click code to highlight preview element, click element to jump back to code. Ideal for HTML beginners. - Skill: `xmm17879829028/html-viewer-with-two-way-highlight` (Agent Skill, multi-file: 3 files) - Install (CLI): `npx skillmds@latest add xmm17879829028/html-viewer-with-two-way-highlight` - Raw SKILL.md: https://api.skillmd.com/api/skills/xmm17879829028/html-viewer-with-two-way-highlight/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Web & Frontend - Author: XMM17879829028 (https://skillmd.com/u/xmm17879829028) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/xmm17879829028/html-viewer-with-two-way-highlight --- # HTML Viewer with Two-Way Highlight (For Beginners) ## Overview This is a free online **HTML viewer**, **HTML runner**, **HTML test** and **HTML preview** tool built for HTML beginners. The core feature is real-time **two-way code-element highlighting**, which helps learners understand the relationship between code and rendered UI quickly and intuitively. ## Key Features - **Two-way highlight**: Click code to highlight the corresponding element in the preview. Click any element to jump to its source code. - **Instant HTML preview & run**: Paste HTML code and see the result immediately as a real HTML runner. - **Simple & clean UI**: No ads, no login, no installation. - **Lightweight & fast**: Pure static website, works on any browser. ## Ideal For - HTML beginners learning tags and layout - Quick HTML test and debugging - Teaching HTML code-structure relationships - Online HTML preview without local environment ## How to Use 1. Open https://html-viewer.org 2. Paste or type your HTML code in the editor 3. The preview shows instantly as an HTML previewer 4. Click code on the left → element highlights on the right 5. Click element on the right → code highlights on the left ## Example ```html Demo

Hello HTML

This box will highlight when clicked