What this tool does
It combines common text operations like counting words, characters, lines, sentences, and paragraphs, plus removing duplicate or blank lines, sorting and numbering lines, trimming each line, converting case, trimming whitespace, and find/replace.
Why it is private
The text stays in your browser the whole time. Nothing is uploaded, nothing is processed by the server, and nothing is stored in server memory.
Helpful note
Most operations read from the input box and write the result into the output box, so you can compare before and after, then promote the output into the input when you want to keep going.