I know there are probably many services offering it already out there, and it’s not too hard to run right in TextMate, but I haven’t been able to find it in 30 seconds of Googling (well, I couldn’t at work, but I’ve since found this… Oh well!), so I set up a quick script to do it for me:
If it’s useful, I might set up a memorable URL, let me know in the comments
I did set up syntax highlighting, using codemirror, which looked pretty nice, but made the minification (on large-ish files) take far too long. I haven’t really tested on any huge files, so try this at your own risk, but it seems faster that TextMate was.