Every standard paper size in millimetres, inches and pixels — ISO A, B and C, US Letter and Legal, ANSI, architectural and JIS B.
Count words, characters, sentences and paragraphs, and see how long the text takes to read or say out loud.
Compare two versions of a text and see exactly what was added and removed — line by line, or word by word for prose.
Convert pixels to rem and back at any root font size, with a reference table for the sizes you actually use.
Convert between Markdown, HTML and plain text — headings, bold/italic, links, lists, images, blockquotes and code all carry across.