AllTools.dev
calculator.net
AllToolsLab
Omni Calculator
BestToolsKit
Muxtly
geteasetools.com
Free Top Tools
Decode Tools
FormatterJSON
JSON Formatter & Validator
JsonKit
JSON Master
AllTools.dev is a modern, fast, free online toolkit built for people who need quick, accurate calculators and converters without signing up, creating an account, or wading through cluttered interfaces. The platform offers 500+ tools across finance (mortgage calculators, loan amortization, compound interest, currency conversion, debt payoff, retirement planning), health (BMI, calorie needs, pregnancy tracking, ideal weight, body composition), math (scientific, statistical, geometric, percentage, fraction), science and engineering, date and time utilities, unit conversions (volume, length, temperature, power, area), developer utilities (JSON, regex, JWT, hashing), and interactive math and algorithm visualizations. Every tool is free and works instantly in the browser. No accounts, no paywalls, no sign-in walls, no data collection beyond standard analytics. Calculations happen client-side for speed and privacy. Unlike older established calculator sites that grew through 20 years of ad-heavy layouts and outdated UX, AllTools.dev is built fresh on Astro with a clean, mobile-first, accessibility-conscious interface. New calculators ship weekly based on user demand. Ideal for: students doing homework, developers needing quick conversions, finance-minded folks planning loans and investments, professionals doing scientific or engineering calculations, and anyone who just needs a fast answer without installing an app.
AllTools.dev
Decode Toolscalculator.net - Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with related in-depth information.
FormatterJSON - All-in-one JSON and data conversion toolkit for developers โ 100% client-side. https://formatterjson.org
AllToolsLab - AllToolsLab offers 50+ free online tools including PDF tools, calculators, converters and text utilities.
JSON Formatter & Validator - The JSON Formatter was created to help with debugging.
Omni Calculator - Helping you make rational decisions, one calculation at a time.
JsonKit - 100+ free online developer tools for JSON processing, encoding, encryption, text processing, and more.