How to obfuscate variable names in JavaScript?

Question

I'm an artist that's written a simple game in Javascript. Yah! But go easy on me because I bruise like a peach! I'm looking into difficult to cheat at the game. So code obfuscation will make it difficult to cheat, right? Difficult, not impossible. I realise that, and could accidentally open a can of worms here...

Essentially, I'm Looking for an online tool that renames variables; and don't say search and replace in textpad :). For example using http://packer.50x.eu/ on one line of code

var loopCounter = 0;

we get the result:

eval(function(p,a,c,k,e,d){e=function(c){return c};if(!''.replace(/^/,String)){while(c--){d[c]=k[c]||c}k=[function(e){return d[e]}];e=function(){return'\\w+'};c=1};while(c--){if(k[c]){p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c])}}return p}('1 2=0;',3,3,'|var|loopCounter'.split('|'),0,{}))

The above looks like a mess, which is great; but it's quite easy to pick out English words like loopCounter. I would have expected it to make variable names obscure (single letter? words without nouns? look very similar?? Or should have that been my task anyway as part of writing the code. Or is this a waste of time trying to make variable names since a variable declaration is preceded by var and therefore there's no point to disguise it?

Maybe have a look at Closure Compiler. Does more than code obfuscation, but requires you code to follow some guidelines. — Sirko
– Sirko, Commented Jul 31, 2013 at 9:08
Maybe a duplicate of this: stackoverflow.com/questions/522064/… — FidEliO
– FidEliO, Commented Jul 31, 2013 at 11:45

Ghoul Fool · Accepted Answer · 2013-08-05 15:54:03Z

2

After a lot of searching (and links to the above) I found this which allows obfuscated string variables. And that is what I was after.

answered Aug 5, 2013 at 15:54

Ghoul Fool

7,01713 gold badges77 silver badges142 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

pythonian29033 · Accepted Answer · 2013-07-31 09:10:04Z

0

there are a few online tools available for this: javascript compressor and then theres javascript minifier that you can use for large images also. otherwise you could just google some offline tools, pretty sure they're easy to find

answered Jul 31, 2013 at 9:10

pythonian29033

5,2175 gold badges34 silver badges57 bronze badges

Comments

Alesanco · Accepted Answer · 2013-07-31 11:42:23Z

0

You could use the Javascript Obfuscator... your code will be very difficult to decode!

Hope it helps! ^_^

answered Jul 31, 2013 at 11:42

Alesanco

1,9001 gold badge11 silver badges13 bronze badges

Collectives™ on Stack Overflow

How to obfuscate variable names in JavaScript?

3 Answers 3

Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related