If you are using the default Bitcoin-Qt client, you can use the "export" feature of the client to automatically populate your list of BTC addresses using your existing address labels. Any invalid or duplicated addresses will be skipped.
Open your Bitcoin-Qt client, and open the "Receive coins" tab.
Click the "Export" button and save this CSV file to your computer.
Once this CSV file has been exported, select the "Browse..." button on the "Upload CSV" tab on the add BTC Addresses page to locate and upload this file to CryptFolio.
Is it safe to provide CryptFolio a Bitcoin-Qt CSV file?
The Bitcoin-Qt client will only export your public Bitcoin addresses. These addresses can only be used to retrieve address balances; it is not possible to perform transactions using a public address.