All Tools & Calculators
Browse our complete collection of 345+ free, high-performance calculators and developer utilities.
The Ultimate Professional Developer Ecosystem
Welcome to the Nexus master directory. We believe in providing a seamless, highly optimized experience for professionals. Whether you are formatting JSON, calculating an amortization schedule, or testing API mock data, all of our tools utilize client-side processing to deliver instant results. Because everything runs securely inside your own browser, our platform is deeply privacy-focused—your code, financial data, and personal inputs are never saved or sent to external servers.
Calculators
Financial Calculators
Explore our free suite of financial tools to accurately calculate mortgages, auto loans, ROI, and retirement planning.
Fitness and Health Calculators
Achieve your wellness goals with calculators for BMI, daily calories, macronutrients, and pregnancy tracking.
Math Calculators
Solve complex mathematical equations, geometry problems, and statistical analysis with precision.
Other Calculators
A wide variety of everyday utility calculators including time, date, conversion, and miscellaneous estimates.
Calculators for Your Site
Embed our free, high-performance calculators directly into your own website or blog.
Developer Tools
Text & Formatting
Format, minify, and validate JSON, HTML, CSS, SQL, and other text-based documents.
Encoding & Security
Secure your data with Base64, URL encoders, JWT decoders, and robust hash generators.
Generators
Instantly create UUIDs, mock user data, passwords, API mock data, and HTML tables.
Color Tools
Design tools including HEX/RGB converters, gradient generators, and Tailwind palettes.
Web Dev Utilities
Essential utilities like SEO tag generators, Minifiers, HTTP header checkers, and IP lookups.
PDF Tools
PDF Manipulation
Merge, split, compress, and organize your PDF files easily.
Convert from PDF
Convert PDF files into editable formats and images.
Convert to PDF
Convert various file formats into standard PDF documents.
PDF Security
Add passwords, remove restrictions, and secure your PDFs.
Image Tools
Image Editing
Compress, resize, and edit your images quickly.
Image Conversion
Convert between various image formats easily.
Advanced Tools
Advanced utilities for developers and designers.