txt Text Value
imgix recommends using the Base64 variant version of this parameter to make encoding values easier.
The text value to set on the image. This value must be supplied if text is to be rendered. All other text parameters are ignored if this value is not set. imgix has full support for UTF-8 characters which means appropriate rendering for non-Latin character sets and emoji.
Using Base64 encoding
Using Base64 encoding can help make sure you do not run into issues encoding text into URLs.