Tools

Last changed: 10/27/2025

A Collection of useful web tools and utilities I’ve created.

Kilometerhok KML Generator

Generate KML files for Dutch kilometerhokken (square kilometer grid cells) in the RD coordinate system for import into Google Maps or Google Earth.

Transform your images to fit Instagram’s best post dimensions.

Calculate the current planetary hour based on the location and time

An interactive tool for identifying species in the genera Senecio and Jacobaea based on their characteristics.

Keep track of scores for Rummikub Word games with multiple players and rounds.

Get high-quality favicons from any website.

These tools are provided as-is for educational and practical purposes. Feel free to use them and provide feedback!