Excel 2016, 2013 and 2010 have feature that automatically does a conversion of all web address in to hyperlinks. This conversion takes place as you complete typing the internet address. But if you want to turn off this feature then you can use the relevant settings available as part of Excel options.
Step 1: Click the File menu and select Options from the menu list.
Step 2: In the Excel Options window, click Proofing section followed by Autocorrect Options button.
Step 3: In the AutoCorrect window, click AutoFormat As You Type tab and un mark the check box with label as “Internet and network paths with hyperlinks”.
Step 4: Click OK button to confirm and save the changes.
But if you want to turn of for specific web address then you can precede the hyperlink with apostrophe.