Source Code Viewer — HTML, CSS, JS, JSON & XML by Nicolas Dos Santos
View & format source code with syntax highlighting — HTML, CSS, JavaScript, JSON & XML. A clean source code viewer & formatter.
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About this extension
Tired of staring at your browser's bland, unstyled source viewer? Source Code Viewer is here to fix that. View — and format — the source of any web page with proper formatting and beautiful syntax highlighting, right from the "View Page Source" context menu or with a single click on the toolbar icon. No more walls of unreadable text. Just clean, colorized code, the way it should be.
✨ What you get:
• Beautiful syntax highlighting for HTML, CSS, JavaScript, JSON & XML
• Automatic formatting & beautification — pretty-print minified CSS, JS, JSON & HTML
• Automatic in-place formatting when you open a raw CSS/JS/JSON/XML file directly
• A range of light & dark themes
• Word wrap, line numbers & code folding
• Clickable links to jump between resources without leaving the viewer
• One-click switch back to the browser's native source view
• Available in multiple languages
Great for developers, web designers, and anyone who needs to view or format HTML, CSS, JavaScript, JSON, or XML source code — a clean source code viewer, JSON/XML viewer, and code formatter in one.
✨ What you get:
• Beautiful syntax highlighting for HTML, CSS, JavaScript, JSON & XML
• Automatic formatting & beautification — pretty-print minified CSS, JS, JSON & HTML
• Automatic in-place formatting when you open a raw CSS/JS/JSON/XML file directly
• A range of light & dark themes
• Word wrap, line numbers & code folding
• Clickable links to jump between resources without leaving the viewer
• One-click switch back to the browser's native source view
• Available in multiple languages
Great for developers, web designers, and anyone who needs to view or format HTML, CSS, JavaScript, JSON, or XML source code — a clean source code viewer, JSON/XML viewer, and code formatter in one.
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Permissions and data
Required permissions:
- Access browser tabs
- Access your data for all web sites
Optional permissions:
- Access your data for all web sites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 1.6.1
- Size
- 481.28 kB
- Last updated
- 2 days ago (22 Jul 2026)
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