Documentation Debt CalculatorEstimate what undocumented pull requests are costing your team per year, benchmarked against a real 514-repo dataset.llms.txt ValidatorPaste a domain and check that every URL listed in its llms.txt actually resolves, instead of 404ing or redirecting to a signin wall.Doc Freshness CheckerPaste a public GitHub repo (and optionally a docs page) to check whether your docs have fallen behind the code's last commit.Docs Readability ScorerPaste any doc or article text to get its Flesch reading ease, grade level, and complex-word density.Technical Writer vs. DocsKoala Cost CalculatorCompare the annual cost of hiring a technical writer against a DocsKoala plan, using a cited public salary figure.