Website Html Checker

Website Html CheckerWebsite Html Checker

Website Html Checker is a tool used for searching sites for HTML5 and CSS errors. It begins checking from the starting page and goes through all pages one by one until it checks all pages on the site. If Website Html Checker finds an error, it shows its position in the document, the reason of the error and a hint how it can be fixed. Website Html Checker utilizes a fully conformant with the HTML5 spec html parser. It can check the entire site, one of its pages or one directory. Website Html Checker includes a feature-rich web site crawler, which supports different user authentication types such as SSL certificate and form login.

To achieve highest performance Website Html Checker uses a unique multi-threaded algorithm, which allows checking several pages at a time. This algorithm minimizes checking time and scanning a large site becomes faster.

When the scanning process is complete, you can view scanning results and generate reports. In the viewer window you can explore all found markup errors on your web site and view detailed information on each one. You can generate a variety of report types, including html, xml, Excel and text formats.

Getting started


Download Website Html Checker for Windows 64-bit Version:
Download Website Html Checker for macOS 64-bit Version:


Website Html Checker Online Manual in HTML format available through the web.
WebTweakTools documentation in PDF format.

Key features

  • Small and easy to use;
  • Checks pages for HTML5 and CSS errors;
  • Checks all static and dynamic HTML pages;
  • Utilizes a fully conformant with the HTML5 spec html parser;
  • Includes a feature-rich web site crawler that can check the entire site, one of its pages or one directory;
  • Supports password-protected sites with different user authentication types such as SSL certificate and form login;
  • Supports HTTP and SOCKS proxy servers.


Main Window on Windows Main Window on Mac View Window on Windows View Window on Mac

Ordering information

The easiest and fastest way to order the software is using a credit card and purchase through special server provided by the authorized registration service. The order form is located on secure server and all transactions are processed via the secure SSL protocol ensuring that your private data will remain confidential. Credit cards accepted: Visa, MasterCard, American Express, Discover, Diners Club, JCB, Maestro. Other payment methods: Check, Cash, Bank/Wire transfer, PayPal. Payments can be made Online, by Purchase Order, Fax, Phone or Postal Mail. After you have submitted your form, you will receive the activation code in 24 hours. If you run into a problem, please feel free to contact our Support Service. We will be happy to help you.

1yr. Updates and Support $ 39.95 USD Buy Now
2yr. Updates and Support $ 49.95 USD Buy Now
3yr. Updates and Support $ 59.95 USD Buy Now


Once your order is successfully processed, you will receive email confirmation with your activation code. To activate Website Html Checker:

  • Open the "Activation/Registration" dialog from the "Help" menu of the main window, then enter your activation code exactly as shown in the registration email. It is important to remember that character case, punctuation, and spaces are significant. We suggest that you copy and paste the code directly from your registration email to the activation dialog.
  • You have two activation options:
    1. On-line activation
      On-line activation is the easiest and fastest way to activate our products. If your computer is connected to the Internet, simply click the "On-line Activation" button.
    2. EMail activation
      EMail activation allows you to activate our products without direct connection to the server. You need to send us your activation code and hardware fingerprint by email. If you have more than one license you can send us hardware fingerprint for each computer in one message. Click the "EMail Activation" button to open your default email client with precompiled message body.
  • You can use one copy of the software on only a single computer at any one time. You can activate your software as many times as you want on the same computer (with the same hardware fingerprint).
  • Activation is based on the hardware configuration of your computer. If you upgrade some significant parts on your computer, reactivation might be required. In that case please contact our Support Service.
  • You will be able to reactivate your software on a system with different hardware fingerprint automatically in 6 months after last activation.
  • Money-back guarantee: If for any reason you're not happy with our product, simply let us know within the first 30 days and we'll give you the full, prompt refund. No questions asked!

Categories: HTML Checker