One clean place for everyday tools people actually use.
Calculate money, health, dates and grades. Work with PDFs and images. Generate QR codes, passwords and developer utilities — with privacy-first browser processing wherever possible.
Browse by category
Organized around real tasks, not a cluttered list.
Finance & Money
Plan loans, paychecks, taxes, debt, retirement and major purchases with practical U.S.-focused calculators.
Health & Wellness
Everyday wellness calculators for body metrics, nutrition, pregnancy timing and sleep planning.
Math, Date & Conversion
Fast everyday calculations for dates, percentages, time, units and distance conversions.
Education
Simple student tools for GPA, grades and fraction calculations.
PDF Tools
Private browser-based PDF utilities to merge, split, convert, compress and export documents.
Image Tools
Compress, resize and convert common image formats directly in your browser.
Developer & Utility
Handy text, QR, password and developer helpers for everyday workflows.
Popular tools
Fast entry points for common U.S. searches and everyday workflows.
Finance & MoneyMortgage Calculator
Estimate monthly U.S. mortgage payments, principal and interest from home price, down payment, rate and loan term.
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Finance & MoneyTip Calculator
Calculate tip amount, total bill and per-person split in seconds.
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Health & WellnessBMI Calculator
Calculate Body Mass Index from U.S. or metric height and weight inputs.
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Finance & MoneyPaycheck Calculator
Estimate take-home pay from gross pay using federal, state and payroll tax assumptions.
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Image ToolsImage Compressor
Compress JPG, PNG or WebP images in-browser with adjustable quality.
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PDF ToolsMerge PDF
Combine multiple PDF files into one downloadable PDF directly in your browser.
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Developer & UtilityQR Code Generator
Generate downloadable QR codes for links, text, Wi-Fi details or contact information.
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Developer & UtilityJSON Formatter & Validator
Format, minify and validate JSON with readable error feedback.
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Math, Date & ConversionAge Calculator
Calculate exact age in years, months and days from a birth date.
→Useful without feeling complicated.
Tools Hab is designed around quick answers, readable results, transparent assumptions and local browser processing for many file and developer tools.
Plain-language labels and sensible defaults.
Main answer plus supporting metrics.
Disclaimers where finance or health context matters.
Static HTML, CSS and JavaScript foundation.