We appreciate your business!
- Your purchase is backed by our 30-day money back guarantee.
- Licenses are NOT limited by number of websites or domains.
- See below for a special TopStyle 4 bundle offer.
- Please contact us if you have any problems or questions about ordering.
| Number of Licenses | Standard Price Each (US $) |
Professional Price Each (US $) |
|---|---|---|
| Single License | Buy Now for $69 | Buy Now for $129 |
| Two to Nine Licenses | $69 | $109 |
| Ten to Nineteen Licenses | $59 | $89 |
| Twenty or More Licenses | $49 | $79 |
| Site/enterprise Licenses | Site License Info | Site License Info |
| Government Information | Gov't License Info | Gov't License Info |
| TopStyle 4 Bundle | $99 | $159 |
| --- 30 DAY MONEY BACK GUARANTEE --- | ||
What's the difference between the standard and professional editions?
![]()
When you place an order, your order will be securely processed through Plimus. Plimus charges US sales tax only for CA residents. Plimus also offers many different payment options, including credit card, PayPal, e-check, online bank transfer, direct debit, and France's Carte Bleue.
Government Information | Site Licenses | Buy Upgrade | 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 now 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.
| Priority Support and Maintenance Prices for New Licenses and When Upgrading |
Standard Price Each (US $) |
Professional Price Each (US $) |
|---|---|---|
| One Year | $49 | $49 |
| Two Years | $98 | $98 |
| --- 30 DAY MONEY BACK GUARANTEE ON NEW LICENSES --- | ||
Special TopStyle 4 Bundle
NOTE: When buying the TopStyle bundle, you can optionally upgrade to CSE HTML Validator Professional for an additional $60. Also, if you buy the standard edition, then you can always upgrade to the professional edition later.
Buy CSE HTML Validator and TopStyle 4 together and save!
TopStyle contains powerful tools for building standards-compliant web sites. Use it to edit your HTML, XHTML, and CSS in a single application.
TopStyle integrates with CSE HTML Validator, so you can check your documents with CSE HTML Validator without leaving TopStyle.
Buy TopStyle 4 and CSE HTML Validator Standard together for only $99 and save almost $50 compared to buying them individually!
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.

