Online Tool to Unminify / Decompress JavaScript?

You can use this : jsbeautifier.org But it depends on the minify method you are using, this one only formats the code, it doesn't change variable names, nor uncompress base62 encoding.

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I'm specifically looking to unminify a minified JavaScript file, so variable renaming (like with compression or packing) should theoretically not be an issue. Javascript code-formatting minify decompression unminify link|improve this question edited Jun 22 '09 at 16:33altCognito16k13367 asked May 4 '09 at 21:20Andy Ford2,9342822 100% accept rate.

You can use this : jsbeautifier.org/ But it depends on the minify method you are using, this one only formats the code, it doesn't change variable names, nor uncompress base62 encoding. Edit: in fact it can unpack "packed" scripts (packed with Dean Edward's packer : http://dean.edwards. Name/packer/).

2 +1 - I've used this method before, and jsbeautifier.org is an excellent service. – Daniel Lew May 4 '09 at 21:27 Thanks. This is exactly what I was looking for.

– Andy Ford May 4 '09 at 21:29 1 Nope, I said base 62 : dean.edwards. Name/packer and en.wikipedia.org/wiki/Base_62 – Fabien Ménager May 5 '09 at 6:25 1 is there such a thing as a tool that "changes variable names" and is still aware of JS syntax to not break the code? – Jorge Vargas Sep 7 '09 at 7:57 3 would up this 10 times if I could.

Just saved me from a wasted day! – benlumley Sep 15 '09 at 16:34.

Chrome developer tools has this feature built-in. Bring up the developer tools (pressing F12 is one way), in the Scripts tab, the bottom left bar has a set of icons. The "{}" icon is "Pretty print" and does this conversion on demand.

UPDATE: IE9 "F12 developer tools" also has a "Format JavaScript" feature in the Script tab under the Tools icon there. (see Tip #4 in F12 The best kept web debugging secret).

For the particular . Js I was trying to un-minify, this method worked the best, cheers. – igneosaur Oct 6 '11 at 17:33.

1 for answer that also works. Fabien just happened to reply first – Andy Ford May 4 '09 at 21:30 This only answer the "decompress" part of the question. – Jorge Vargas Sep 7 '09 at 7:58.

Most of the IDEs also offer auto-formatting features. For example in NetBeans, just press CTRL+K.

In Firefox, SpiderMonkey and Rhino you can wrap any code into an anonymous function and call its toSource method, which will give you a nicely formatted source of the function. ToSource also strips comments. E.

G. : (function () { /* Say hello. */ var x = 'Hello!

'; print(x); }).toSource() Will be converted to a string: function () { var x = "Hello! "; print(x); } P. S.

: It's not an "online tool", but all questions about general beautifying techniques are closed as duplicates of this one.

Interesting. I asked the question 2.5 years ago so I feel it's too late to edit the title, but I still like seeing both online and offline options. Thanks for chiming in.

+1 – Andy Ford Oct 3 '11 at 19:55.

As an alternative (since I didn't know about jsbeautifier.org until now), I have used a bookmarklet that reenabled the decode button in Dean Edward's Packer. I found the instructions and bookmarklet here. Here is the bookmarklet (in case the site is down) javascript:for%20(i=0;i Length;++i)%20{for(j=0;j RemoveAttribute(%22disabled%22);}}.

Try this one, with code coloration: labs.swelen.com/tools/javascript/beauty.....

I'm not sure if you need source code. There is a free online JavaScript formatter at blackbeltcoder.com/Resources/JSFormatter....

If you have a Mac and TextMate - An easy alternative for formatting Javascript is: Open the file with Textmate. Click on > Bundles > JavaScript > Reformat Document Crack open a beer.

Beer being served right now :) – dgilperez Dec 9 '11 at 16:48.

Click on these link for JS deminification. That will install on FF as extension that help you in debugging js at runtime. Https://addons.mozilla.org/en-US/firefox/addon/javascript-deminifier/eula/141018?src=dp-btn-primary.

If one is in JS possibility of using Firefox is more. And if its Firefox add on is for rescue. Following one is particularly useful.

Https://addons.mozilla.org/en-US/firefox/addon/phoenix.

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