Unicode Viewer

Unicode Viewer is a lightweight Java applet that you can use to check if your system has full Unicode support. It's open-source and its code is available in the downloaded package for those interested in taking a look or further modifying it.

Find out if your PC has Unicode support

The character sets are displayed in Courier, Helvetica, Dialog, and others. It's not necessary to install it. Provided that you have Java Runtime Environment installed, you can simply double click the .jar file to reach the main app window.
The preferred charset can be picked from a dropdown menu on the upper-right corner of the window. Instructions are shown on the bottom for viewing the hex code of any character, which implies selecting the first digit with the corresponding white square at the bottom and the second with a match on the right.

View the hex code of any character

Afterward, you can spot the third digit and fourth digits with the corresponding black square on the bottom and right, respectively. At this point, you can go through various fonts to see how the glyphs change.
Unfortunately, characters or character sets cannot be copied or saved to file as images. Besides the fact that you can change the look and feel of the window, there are no other options provided by this application.

View glyphs in different fonts

The tool worked smoothly on Windows 10 in our testing even if Unicode Viewer hasn't received updates for a pretty long time. It had minimal impact on the computer's performance and triggered no errors.
On the other hand, users might be put off by the somewhat confusing instructions for viewing hex code. Nevertheless, Unicode Viewer delivers a convenient solution to help you figure out if Unicode is supported by your operating system.