Version 18.04 Version 18.04 is now available.
RECOMMENDED: Print this short Quick Start Guide to help you get started.
If you've purchased a license then you can download the registered user version of CSS HTML Validator. You will need the registration information that was emailed to you. Thank you for your support!
CSE HTML Validator Standard v16.04 is a FREE older version that is only licensed for personal, non-commercial use. Download this free version here.
After downloading, run the setup installer and answer Yes to the User Account Control prompt then follow the simple installation instructions. The setup program is digitally signed by AI Internet Solutions LLC (do not run it if it is not).
IMPORTANT: On some systems it may take 1 to 2 minutes for the User Account Control dialog to appear because the system is checking the file.
If the User Account Control dialog does not appear or you get an error message like "Error 5: Access is denied." then please try one or more of the following: