Math & Numbers
Compare two independent samples with the nonparametric Mann-Whitney U rank-sum test
mann-whitney-u-test-calculatorMath & Numbers
Calculate the margin of error for a mean or proportion from sample size, confidence level, and variability
margin-of-error-calculatorMath & Numbers
Calculate raw and excess kurtosis to measure tail weight and peakedness of a distribution
kurtosis-calculatorMath & Numbers
Solve linear equations of the form ax + b = 0 using coefficients or a typed equation
linear-equation-solverMath & Numbers
Calculate logarithms with any valid base, with optional log10, log2, and natural-log comparisons
logarithm-calculatorDevelopment
Convert structured service logs into Mermaid or PlantUML sequence diagrams, with optional latency and error annotations
log-sequence-diagram-converterMath & Numbers
Convert kilometers per hour to miles per hour with configurable decimal precision
kmh-to-mphMath & Numbers
Convert kilometers to miles with configurable decimal precision
km-to-milesMath & Numbers
Convert pounds to kilograms with configurable decimal precision
lb-to-kgDocument Tools
Convert DOC/DOCX to PDF/A using LibreOffice rendering and Ghostscript conformance pass
libreoffice-docx-to-pdf-aDocument Tools
Convert Office files to PNG/JPG previews with LibreOffice, with optional thumbnail resize
libreoffice-office-to-imageDocument Tools
Replace placeholders in DOCX template and render merged records to PDF using LibreOffice
libreoffice-template-fill-merge