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You need to build a 4D-based web site. You want the best, most flexible, most productive and most cost-effective tool available. And you don’t want to learn a whole new tag language.

Active4D is the ultimate 4D web development environment, offering you unparalleled power and simplicity while leveraging your existing 4D programming knowledge. Nothing else comes close.

NOTE: When ordering a new license, please enter the LAN IP address of the server on which it will run in the order notes.

Write real 4D code

With Active4D, you aren’t stuck with the limitations (and unreadable syntax) of simple tags, you write the same 4D code you are used to. Use local variables, access fields, call methods, you name it — if you can do it in 4D, you can do it in Active4D, right in your web page.

But Active4D doesn’t stop there. It extends the 4D language itself with much sought after enhancements, like vastly improved string handling, a collection data type (kind of like 4D objects on steroids), and extensive, integrated regular expression support.

Direct database access

Active4D gives you direct access to the database engine right within the web page — no need to call a 4D method! The full range of database commands is available.

Built in session support

If you are building a dynamic web site, you need session support. Sessions allow you to store per-user data between requests. Things like user ids, shopping carts, and so on.

With Active4D, session support is built in and integrated directly into the language. You can store any number of named items of any type in a session, including arrays. It doesn’t get any easier.

Try it free!

It costs nothing to try Active4D. You can use it for up to 8 hours continuously before relaunching 4D. This gives you lots of time to play around and even start developing your first great web site with Active4D.


What you will need:

  • macOS Mojave (10.14)+ (64-bit)
  • Windows 10+ (64-bit versions)
  • Windows Server 2012+ (64-bit versions)
  • 4D v18+

What you will get:

  • Plugin (all platforms)
  • Documentation
  • Starter database
  • Demo web site