Build a table of contents from Markdown headings with GitHub-accurate anchor slugs, including the -1 suffix on duplicate headings. ANCHORSDUPLICATE HANDLINGMARKDOWN + HTMLCLIENT-SIDE
Anchors use GitHub's rule: lowercase, spaces to hyphens, drop everything that is not a letter, digit or hyphen. Duplicate headings get the -1, -2 suffix GitHub appends.
Paragraphs, word lists or bullets in several styles, with a live count.
Spell any number out in words, and hear it spoken aloud.
Search and copy emoji by name, with skin-tone and category filters.
Encode or decode with a 5x5 Polybius square, with an optional keyed alphabet and GitHub-style coordinate pairs.
US Navy circumference body fat percent, lean mass, fat mass and fitness band.
Devine, Robinson, Miller and Hamwi side by side, plus the healthy BMI band.
Reduce a ratio with GCD, scale it, split a whole, and convert seven unit pairs.
Percent change, the reverse, percent-of, and compound growth over N periods.
