Do you want test a short Pascal snippet and you don’t have a compiler? try the site called ideone.
What is ideone?
Ideone is something more than a pastebin; it’s an online compiler and debugging tool which allows
to compile and run code online in more than 40 programming languages.
This site currently supports these two Pascal compilers
fpc (Free Pascal Compiler) 2.2.0 (Target OS: Linux for i386)
gpc (GNU Pascal Compiler) 20070904
for the limitations about the code submitted and others check the FAQ.