ATRX Dev Tools
A collection of handy developer tools and articles — fast, free, and right in your browser.
Tools
Browser-based utilities to speed up your workflow
API Request Tester
Test API endpoints in your browser by sending HTTP requests, customizing headers and bodies, and inspecting status codes, timing, and responses.
Open tool →Base64 Encode / Decode
Encode text to Base64 or decode Base64 strings instantly in your browser for debugging, data transfer, integrations, and web development tasks.
Open tool →BMI Calculator
Calculate body mass index from your height and weight with a fast online BMI calculator for quick health check-ins and progress tracking.
Open tool →Color Converter
Convert HEX, RGB, and HSL color values instantly in your browser for CSS styling, design systems, and frontend development work.
Open tool →Compound Interest Calculator
Calculate compound interest growth for savings and investments with contributions, compounding frequency, and year-by-year projections.
Open tool →Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text instantly in your browser for verification, testing, and development work.
Open tool →Articles
Guides, tips, and insights for developers
Best AI Tools in 2026: Practical Picks by Category
A practical guide to 46 AI tools for writing, coding, design, automation, voice, MLOps, and business workflows, with quick pricing notes and tradeoffs.
Read more →Base64 Explained: What It Is, How It Works & Real-World Uses
Learn what Base64 encoding is, how its 6-bit mapping and padding work, where it is used, and why it should not be mistaken for encryption.
Read more →Why You Should Never Reuse Passwords Across Websites
Learn why reusing the same password across multiple sites is dangerous and how one breach can put many of your accounts at risk.
Read more →Why Secure Passwords Are Essential for Protecting Your Online Accounts
Learn why strong passwords matter, what makes a password secure, and how to protect your accounts from common attacks.
Read more →Why Every Developer Needs a BMI Calculator
Learn why a simple BMI calculator can help developers track health trends, counter sedentary habits, and support long-term wellness.
Read more →What Makes a Password Truly Secure?
A clear explanation of password length, entropy, randomness, and character combinations, plus what actually matters most when creating stronger passwords.
Read more →