Version 16.02 is now available!
  • Licenses start at only $69.
  • Use one license on up to two computers if you are the only user of both computers.
  • Licenses are NOT limited by number of websites or domains.
  • Your purchase is backed by our 30-day money back guarantee.
  • You can also buy from a software reseller.

Problem Ordering?

  • Please try a different browser, preferably one running fewer plug-ins and add-ons.
  • One such plug-in reported to cause problems is Privacy Badger.
  • Contact us if you have any problems or questions.

Buy CSE HTML Validator for Windows

Please choose the quantity and edition that you want.

CSE HTML Validator Box
Price per License (in USD)
Quantity Enterprise Professional Standard
1 Buy Now for $349 Buy Now for $129 Buy Now for $69
2-9 $299 $109 $69

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BlueSnap accepts Visa, Mastercard, American Express, Discover, and more

When you place an order, your order will be securely processed through BlueSnap (formerly Plimus). BlueSnap charges US sales tax only for CA residents. BlueSnap also offers many different payment options, including credit card, PayPal, e-check, online bank transfer, direct debit, and France's Carte Bleue.

Compare Editions  Gov't Information  Site Licenses  Upgrade Policy  Classroom Use

After placing an order, please wait for download and registration information to be emailed to you. This will allow you to download a registerable version and register it.

If you need more information before buying then please visit the detailed ordering page with complete ordering information.

Optional Priority Support and Maintenance (PS&M)

Optional priority support and maintenance (PS&M) (for one and two year periods) is available. This includes priority support for technical support questions as well as guaranteed free major upgrades during the priority support and maintenance period.

To add PS&M to your order, simply choose the appropriate option on the order page to add PS&M for the desired period (one or two years). The below prices are valid only when buying new licenses or when buying version or edition upgrades for existing licenses and are in addition to the new license or upgrade price.

NOTE: New orders for (and upgrades to) the enterprise edition include one year of PS&M at no additional cost.

PS&M Pricing for New Licenses and When Upgrading (price per license in USD)
Time Period Enterprise Professional Standard
One Year Included ($0) $79 $79
Two Years $199 $139 $139

30-Day Money Back Guarantee

AI Internet Solutions offers a 30-day money back guarantee. If you are not completely satisfied with CSE HTML Validator, then we will gladly give you a refund if you tell us within 30 days of your purchase.