UtilityHub
Fast, privacy-first web applications built for software engineers, contractors, finance analysts, and students. Zero server tracking, instant local computations.
Featured Master Tool Suites
Consolidated Multi-Format UtilitiesUUID & GUID Generator
RFC 4122 v1, v3, v4, v5, v6, and v7 UUID suite. Batch generation, formatting options, and TXT export.
CSV Data Converter Studio
Transform CSV into JSON, XML, YAML, SQL INSERTs, Markdown tables, HTML tables, GeoJSON, and KML.
Master Mulch Calculator
Estimate mulch bags, cubic yards, and total cost for 8 garden bed geometries (rectangles, circles, borders).
Square Footage & Area Cost
Compute room surface areas for 9 regular polygon shapes with contractor waste factor allowances.
Date & Time Calculation Suite
Compute time spans between dates, add/subtract offsets, countdown target timers, and Unix epoch timestamps.
Unit & Dimension Converter
Convert length, area, volume, mass, temperature, pressure, energy, power, and digital storage units.
Explore Category Hubs
UUID generators, CSV converters, JWT decoders, Base64 encoders, and URL parsers.
Compound interest, mortgage estimators, ROI calculators, and salary rate converters.
Mulch volume estimators, square footage cost calculators, and concrete volume tools.
Why UtilityHub is Different
Calculations run inside your browser engine. Your data, text, and keys never touch a server.
Formulas follow RFC 4122, NIST specifications, SI unit benchmarks, and published financial models.
Every tool page includes educational math explanations, formulas, code snippets, and verified FAQs.