List Converter can process column-based data and apply various changes (transpose, add prefix and suffix, reverse list, sort list, lowercase values, truncate values) to each row.
Text Diff is a useful online tool that allows you to compare the differences between two text files or fragments. You can use it to find and merge changes, detect errors, or simply check for consistency.
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.