Awesome... Now someone just write a script that would copy addresses from directory.io, check here and bingo!

I lol'ed at the hit counter, haven't seen one of those in ages
But seriously great looking site man and I love how you did it all with jquery, I was expecting it was going to be PHP. I saw you use multiple sources to check the balance, can you explain more about that? Is that due to the request limits for querying their API?

Hey you made my day, look here: https://bt.irlbtc.com/view/1120447.0

This is exactly what I was looking for and actually came to this section to request someone to make something like this and I found this It works flawlessly, I just tried to check balance of bunch of addresses and had no problems with it at all. Thank you so much.

You should put it on a small domain and put some advertisements, I think this is really usable. One more API I can suggest is Blocktrail.com

You know what other app I think will be great which maybe you can develop as your next project, a 'TX Fee adviser' people are always struggling with how much fee they need for a transaction, an app where one can add input addresses and output addresses and the amount of bitcoin one needs to send and hit enter and it would tell how much is the advised fee for this transaction would be brilliant.

Send you a small tip 
https://blockchain.info/tx/09c231603348656e84e7c4fba0d88027f38b14bb99fb2e10a6f74f754adb4760

I was actually worried because I have heard of people that hacked btc account without knowing the balance but just risk doing it but I personally feel that the balance in an account can motivate crime.
All the same pardon my ignorance. 

Thank you all for your explanations, I am also worried about this. I wish I have something to teach someone also.

Thanks, I just wanted to post that the link in OP is not working anymore. I am using this service for almost 10 months. It is very useful to check a bunch of addresses for balances.

Thanks for sharing!

@OP: Could you release the source code as open source? So someone could set up an own service when your service will not be available again.

I tried to check the site but it seems down. Thanks for making the script opensource. 

Cool. Bookmarked it for future uses. Thank you.

Nice App! You can see check Bitcoin balance in one display and no need to transfer from site to site. Must be to use and I'm so excited to check it out. Thanks for introducing

The site cant be access..