It wouldn't be TextLab if it wasn't capable of editing plain text strings. You can easily modify your text as follows:
Uppercase opperation changes all the text into UPPERCASED ONE.
On the other hand the lowercase button makes your text string like this one which is lowercased.
Capitalize button may come in handy once you want to have your text Like This.
Lower Camelcase button is going to change your text string, like THIS_IS_AN_EXAMPLE_STRING or this-is-an-example-string, into thisIsAnExampleString.
Upper Camelcase button is going to change your text string, like THIS_IS_AN_EXAMPLE_STRING or this-is-an-example-string, into ThisIsAnExampleString.
Encoding a string into Base64 form is also possible. For example convert TextLab string into it's base64 form VGV4dExhYg==.
TextLab will automatically recognize whether a string is encoded with Base64 and suggests to decode VGV4dExhYg== into text form TextLab.
When you need to remove additional white space to get a pure text string. Click the Remove Additional Whitespaces button and you get exactly what you want.