image provider

Email Masker

Unfortunately, Oracle has effectively decommitted Applets. This means you can no longer run the various CMP programs in a browser. You must download them and install them. You must have the most recent Java JRE (Java Runtime Environment) 1.8.0_131 32-bit or 64-bit. It no longer matters which browser you use.
Oracle has effectively decommited Applets, so this Applet will no longer run online in your browser, but it is a hybrid you can also download, install and run it on your own machine as standalone application. It will start and run faster if you do that. It will also work safely even if you have disabled Java in your browser.

Why Not Clickable?

The email addresses on this website are usually not clickable. They are slightly fuzzy images, not text. I do this not to annoy you, but to discourage spam harvesters. You can use the same technique yourself with this Masker Applet. The following signed Applet will produce *.png files (variable transparency background image files similar to *.gifs, but smaller) that contain your email address. When you post them on your website, it is harder for spammer to harvest them. It will let you make transparent a graphic email icon like this:email Roedy Green  ⇐ png graphic icon, not text.
Make your Email Icon Extra security
Using the Icons Nexodyne
Doctoring Links
Applet failed to run. No Java 1.8 or later plug-in found.

Java Requirements and Troubleshooting

Masker is a signed Java Applet (that can also be run as an application) to Email masker. You are welcome to install it on your own website. If it does not work…
  1. For this Applet hybrid to work, you must click grant/accept/always run on this site/I accept the risk to give it permission to write the generated image files to disk. If you refuse to grant permission, the program may crash with an inscrutable stack dump on the console complaining about AccessController.checkPermission.
  2. In the Java Control Panel security tab, click Start ⇒ Control Panel ⇒ Programs ⇒ Java ⇒ Security, configure medium security to allow self-signed and vanilla unsigned applets to run. If medium is not available, or if Java security is blocking you from running the program, configure high security and add to the Exception Site List at the bottom of the security tab.
  3. Often problems can be fixed simply by clicking the reload button on your browser.
  4. Make sure you have both JavaScript and Java enabled in your browser.
  5. Make sure the Java in your browser is enabled in the security tab of the Java Control panel. Click Start ⇒ Control Panel ⇒ Programs ⇒ Java ⇒ Security ⇒ Enable Java Content in the browser.
  6. This signed Java Applet (that can also be run as an application) needs 32-bit or 64-bit Java 1.8 or later. For best results use the latest 1.8.0_131 Java.
  7. You also need a recent browser.
  8. It works under any operating system that supports Java e.g. W2K, XP, W2003, Vista, W2008, W7-32, W7-64, W8-32, W8-64, W2012, W10-32, W10-64, Linux, LinuxARM, LinuxX86, LinuxX64, Ubuntu, Solaris, SolarisSPARC, SolarisSPARC64, SolarisX86, SolarisX64 and OSX
  9. You should see the Applet hybrid above looking much like this screenshot. If you don’t, the following hints should help you get it working:
  10. Optionally, you may permanently install the Canadian Mind Products code-signing certificate so you don’t have to grant each time.
  11. If the above Applet hybrid appears to freeze-up, click Alt-Esc repeatedly to check for any buried permission dialog box.
  12. If you have certificate troubles, check the installed certificates and remove or update any obsolete or suspected defective certificates. The only certificate used by this program is mindprodcert2017rsa.cer.
  13. Especially if this Applet hybrid has worked before, try clearing the browser cache and rebooting.
  14. To ensure your Java is up to date, check with Wassup. First, download it and run it as an application independent of your browser, then run it online as an Applet to add the complication of your browser.
  15. If the above Applet hybrid does not work, check the Java console for error messages.
  16. If the above Applet hybrid does not work, you might have better luck with the downloadable version available below.
  17. If you are using Mac OS X and would like an improved Look and Feel, download the QuaQua look & feel from UnZip the contained quaqua.jar and install it in ~/Library/Java/Extensions or one of the other ext dirs.
  18. Upgrade to the latest version of Internet Explorer or another browser.
  19. Click the Information bar, and then click Allow blocked content. Unfortunately, this also allows dangerous ActiveX code to run. However, you must do this in order to get access to perfectly-safe Java Applets running in a sandbox. This is part of Microsoft’s war on Java.
  20. Try upgrading to a more recent version of your browser, or try a different browser e.g. Firefox, SeaMonkey, IE or Avant.
  21. If you still can’t get the program working click the red HELP button below for more detail.
  22. If you can’t get the above Applet hybrid working after trying the advice above and from the red HELP button below, have bugs to report or ideas to improve the program or its documentation, please send me an email atemail Roedy Green.
Java powered   Get New Java   Get New Browser   Help

Using the Generated *.png Images

You can include the generated *.png image files in the HTML (Hypertext Markup Language) on your website with: code like this:
Rendering Email addresses
Effect How it Renders HTMLneeded
mailto text link Click to email Roedy Green at
linked graphic Click to email Roedy Green
embedded graphic email Roedy Green at email Roedy Green
Some browsers (i.e. IE) may not render the transparent background of the email address correctly.
embedded graphic on coloured background
email Roedy Green at email Roedy
Some Some browsers (i.e. IE) may not render the transparent background of the email address correctly.
public posting
in a newsgroup
Roedy Green’s email address is posted at:
Roedy Green’s email address is posted at:

When you use the images embedded in small type you may have trouble getting them to align or to avoid creating excess blank space between lines. Shrink the images to roughly the size of the type with the CSS (Cascading Style Sheets) height parameter; then they will behave.


Internet Explorer 5 and 6 have a bug, (fixed in Internet Explorer 7+) in that they do not properly render the transparent *.png files that Masker generates. If you look at this page with IE (Internet Explorer) 5/6, you will can see that the undoctored images don’t display properly. You can massage them so they IE 5/6 can handle them properly by using Corel PaintShop Pro X6. Load the image and flatten it with layers ⇒ merge ⇒ merge all (flatten). Then use Image ⇒ palette ⇒ ⇒ set transparency ⇒ click on some white in the background of the image and save. Not many people still use IE 5/6, so you can just ignore the problem. For the technical details on the problem see the png entry in the Java glossary.

For very old browsers that have no *.png support at all, you can save the images as *.gifs. Doctoring this way will lose the nicely feathered transparency around the letters. The images will look best on a pure white background, unlike the originals that will work on any colour. On the other hand, doctored images are smaller.

undoctored png:email undoctored munged email image
doctored png:email png doctored munged email image
doctored gif:  gif doctored munged email image


Extra security

You want to give automated spam harvesters as few clues a possible:


If can’t or don’t want to use a signed Java Applet like Masker or if you don’t have a server to post the generated icon on the web, you could use the Nexodyne Email Icon Generator. Nexodyne stores the generated icon for you on their webserver, so you can include a link to it in newsgroup postings, emails or blogs without having your own webserver. With Masker, you have to upload the icon to some website before you can link to it. Nexodyne generates opaque images. Masker generates transparent ones. Nexodyne limits your choice of mailservers. Masker does not. Nexodyne is proprietary. Source is included free for Masker.
1.9 2010-03-23 free Java
more infoprecisscreenshotbrowse source repository
for the current version of Masker.
Helps hide email addresses from spam harvesters.
download 577K zip for Masker Java source, compiled class files, jar and documentation to run on your own machine either as an application or an Applet.

Runs on any OS that supports Java e.g. W2K, XP, W2003, Vista, W2008, W7-32, W7-64, W8-32, W8-64, W2012, W10-32, W10-64, Linux, LinuxARM, LinuxX86, LinuxX64, Ubuntu, Solaris, SolarisSPARC, SolarisSPARC64, SolarisX86, SolarisX64 and OSX.

First install the most recent Java.

To install, extract the zip download with WinZip, (or similar unzip utility) into any directory you please, often J:\ — ticking off the use folder names option.

To check out the corresponding source from the Subversion repository, use the TortoiseSVN repo-browser to
access masker source in repository with [Tortoise] Subversion client on

After you have installed the jar, you can run it as an application. Type:

java -jar J:\com\mindprod\masker\masker.jar

adjusting as necessary to account for where the jar file is.

download ASP PAD XML program description for the current version of Masker.

$1989.00 US donated so far. If the CMP utilities solved your problem, please donate a buck or two, or donate to one of the charities featured in the footer public service ads throughout the website and get a tax receipt.

Masker is free. Full source included. You may even include the source code, modified or unmodified in free/commercial open source/proprietary programs that you write and distribute. Non-military use only.
Nexodyne Email Icon Generator
other downloads

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