Engineering Tools

A collection of standalone calculators and utilities for common engineering problems. Each tool is self-contained HTML that runs entirely in the browser - no server required.

Mechanical Engineering

Helical Compression Spring Calculator

Calculate spring constants and compression forces from material properties and physical dimensions. Solves the problem of AliExpress spring listings that show wire diameter, coil count, and material but not the actual spring performance you need for mechanical design.

Home Automation & IoT

Matter QR Code Decoder

Decode Matter/Thread QR codes to extract commissioning information including vendor ID, product ID, discriminator, and passcode. Supports camera scanning for QR codes and includes vendor name lookup for easier device identification.

Games & Entertainment

Block Puzzle

A bug-fixed reimplementation of XP Game Plus’ block puzzle game. Features persistent settings and game state, smooth animations, optimized UI for both landscape and portrait displays, and local high scores. The original has annoying bugs, including incorrect game over detection and dead zones for block placement.

More tools coming soon. Each tool is designed to solve specific problems I’ve encountered in projects, with a focus on practical utility over feature completeness.