Minimalistic but full-featured addressbook in your web browser.
adx is a standalone and portable web app (online and offline).

Contact Management, portable, small (~200KB), lightweight, contact tagging, geo mapping, web accounts, trigger phone/Skype calls, etc.

vCard (as file or QR code via offline generator), embedded Microformats (hCard 1.0, XFN).

Your address-book (XML file) is transformed in your web browser (via XSLT) to a full-featured web application (HTML).

Web browser for viewing online or offline (some like Chrome need a small command line parameter for offline viewing); no server, plugin or anything else needed. Any text editor can be used for contact editing (addressbook.xml).


  • Full-featured web application for contact management
  • XML based
  • Online and offline usage (can be hosted on webserver or local/network folder)
  • Portable (e.g. USB flash drive)
  • Small (~200 KByte) and lightweight
  • no dependencies but a web browser (viewing) and text editor (editing)
  • Geo mapping (by address or longitude;latitude)
  • Support for web accounts
  • Tagging of contacts
  • Search in contacts
  • Browser quick search possible (Search from browser URL bar in contacts)
  • Export contacts as vCard (via file download or QR code)
  • Offline QR code generator
  • Microformats support (hCard 1.0, XFN)
  • Birthday reminder
  • Also suited as Small office/home office (SOHO) address-book
  • Customizable (XSLT)
  • Cross-OS support (incl. Windows, Linux, MacOS, Android, iOS, ...)
  • Cross-browser support (e.g. Firefox, Chrome, Opera, Safari, IE)
  • Embeddable in web sites
  • Note: Focus of adx is contact viewing. Editing can be done with any text editor

Project Samples

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BSD License

Follow adx - addressbook.xml

adx - addressbook.xml Web Site

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User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
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design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 2 / 5

User Reviews

  • This a great project! It is exactly the kind of address book I was looking for: simple but with all features, light and can be used offline. It would be even better if someone could build a simple front-end to introduce or manage contacts. It's a pity the workaround needed to work in Chrome, but I believe there is nothing one could do about that.

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Additional Project Details



Intended Audience

Advanced End Users, End Users/Desktop

User Interface


Programming Language

XSL (XSLT/XPath/XSL-FO), JavaScript

Database Environment

XML-based, Flat-file