No need to type everything manually in a Stat Block - you can just import the spells you need. Tarrasque.io allows you to import spells from the SRD, or from a JSON or XML document.
To start, click the Import icon on the Spells panel, which is next to the Add icon. This will pop up the Import Spells modal.
You can import any spell published under the Open Gaming License by Wizards of the Coast. Simply choose the spell you want from the dropdown list and click Import. The spell will then appear at the top of your spells list.
If you can't find the spell you're looking for in the SRD, you can use the JSON format utilized here
If you can't find the spell you're looking for in the SRD, you can use the XML format utilized here