Explore Other Categories

Discover tools from different categories to expand your toolkit beyond Developer's World.

HTML Encoder

Convert special characters to HTML entities and decode HTML entities back to characters. Free online HTML encoding tool.

Developer World

Brute-Force Blocker

Detect and block brute-force login attacks with rate limiting and IP blocking. Protect against credential stuffing.

Cybersecurity

Leap Year Calculator

Check if a year is a leap year or find the next leap year with our free calculator. Learn about leap year rules and why we need them.

Datetime

Astrophotography Calculator

Calculate optimal camera settings for astrophotography using the 500 Rule and NPF Rule. Get exposure times, ISO recommendations, and image stacking calculations for perfect star photos without trailing.

Astronomy