Diff, count, and preview before you publish.
Diff Checker spots line- and word-level changes between two versions. Text Counter reports characters, words, sentences, paragraphs, and reading time. Markdown Preview renders source the way GitHub and most blog engines will. Use them when reviewing copy edits, fact-checking word counts for forms, or checking that a Markdown file renders as expected before commit.
It marks moved blocks as delete + insert. Move detection is on the roadmap.
GitHub-flavored Markdown (CommonMark + tables, task lists, autolinks).