String Obfuscator is a useful free online tool that could obfuscate a string (like a secret, an IBAN, or a token) to make it shareable and identifiable without revealing its content.
Gradient Text Generator can convert the text you enter into a color linear gradient transition effect. The output text appears as vibrant and colorful as a rainbow, hence it's also called 'Rainbow Text'.
Martian Text Generator can convert the text to a stylized way of writing that uses unconventional characters and symbols to create a unique and sometimes hard-to-read text style.