Free Online Source Code Viewer
Use our free source code viewer to fetch and inspect raw HTML from any URL instantly. Review page structure without browser extensions. Try it now.
About Source Code Viewer
The Doffl Source Code Viewer allows web developers, SEO specialists, and technical auditors to fetch and inspect the raw HTML of any public webpage. Simply enter a URL to retrieve the full page markup without needing desktop browser developer tools or custom browser extensions.
This browser-based utility runs directly on your device, making it ideal for checking source code on mobile devices, tablets, or restricted work machines. It presents fetched code with clean formatting and line numbers so you can quickly analyze page architecture, meta tags, and script references.
Key features
- Fetches raw HTML directly from any accessible web address
- Built-in syntax highlighting for readable markup inspection
- Numbered lines for fast code navigation and referencing
- Mobile-friendly interface for inspecting code on phones and tablets
- One-click copy function to export code to clipboard
- Zero setup required with entirely client-side execution
How to use Source Code Viewer
- Paste the full URL of the webpage you want to inspect.
- Click the fetch button to retrieve the document markup.
- Use the highlighted viewer to read tags, scripts, and meta data.
- Copy the extracted source code to your clipboard for further analysis.
Who is it for?
- Mobile developers inspecting site markup without access to desktop developer tools
- SEO professionals checking canonical tags, open graph metadata, and robots directives
- Security researchers reviewing external script sources and inline JavaScript
- Students and instructors studying real-world HTML document structure
Frequently asked questions
Can I use this source code viewer on a mobile phone?
Yes. Most mobile browsers do not offer a native 'View Source' option, making this web-based tool an easy way to inspect markup directly from any smartphone or tablet.
Does this tool display client-rendered JavaScript modifications?
The tool retrieves the initial server response HTML sent by the host server. It does not run client-side JavaScript frameworks to render dynamic DOM state changes.
Is the source code viewer free?
Yes. The tool is completely free to use with no account registration or software installation required.
Can I view the source code of password-protected pages?
No. The viewer can only fetch publicly accessible web pages that do not require login credentials, session cookies, or CAPTCHA verification.
Why use this tool instead of browser developer tools?
This tool is useful when working on devices without built-in developer tools, such as mobile devices, or when you need to inspect raw server HTML without local browser extensions interfering.