Working with text usually means small, specific edits — counting words for a submission with a limit, converting case for a heading, removing duplicate lines from a list, or checking whether a paragraph reads clearly. None of these individually need a dedicated app, but they come up often enough that having them in one place saves real time.
A distinction worth knowing between two tools that sound similar: a word counter tells you volume (how much you've written), while a readability checker tells you clarity (how easy that writing is to actually read). Both matter for different reasons — a cover letter needs to hit a word count, but it also needs to be readable at a glance, and those are genuinely separate qualities a piece of writing can have independently of each other.
Markdown has become the default format for a lot of technical and web writing — READMEs, documentation, forum posts, note-taking apps — precisely because it's plain text that becomes formatted text with minimal syntax. Our Markdown editor shows a live preview as you type, so you can see exactly how headers, lists, and emphasis will render before you paste it somewhere else.