Oraclize provides a web IDE, using which you can write, compile, and test Oraclize-based applications. You can find it at http://dapps.Oraclize.it/browser-Solidity/.

If you visit the link, then you will notice that it looks exactly the same as browser Solidity. And it's actually browser Solidity with one extra feature. To understand what that feature is, we need to understand browser Solidity more in-depth.

Browser Solidity not only lets us write, compile, and generate web3.js code for our contracts, but it also lets us test those contracts there itself. Until now, in order to test our contract, we were setting up an Ethereum node and sending transactions to it. But browser Solidity can execute contracts without connecting to any node and everything happens in memory. It achieves this using ethereumjs-vm, which is a JavaScript implementation of EVM. Using ethereumjs-vm, you can create our own EVM and run byte code. If we want, we can configure browser Solidity to use the Ethereum node by providing the URL to connect to. The UI is very informative; therefore, you can try all these by yourself.

What's special about the Oraclize web IDE is that it deploys the Oraclize contract in the in-memory execution environment so that you don't have to connect to the testnet or mainnet node, but if you use browser Solidity, then you have to connect to the testnet or mainnet node to test Oraclize APIs.