Tampermonkey is web browser extension that allows adding JavaScript to any website in your browser and manipulate content of that website. It sounds scary and probably should, first you need to trust extension itself and then scripts that you install. Since extension itself has huge community and history, millions of installs across Chrome/Edge/Firefox extensions stores, 5 stars… Let’s assume we can trust it…

I wrote some time ago script that I want to share with everyone, it adds few buttons to OpenStreetMap.org website. Here is example how it looks like:

On example of New York above buttons would take you to following websites:

• PeWu nice and simple history view of changes on nodes, ways or relations
• DeepHistory another history viewer, but in tabular view
• Relation Analyzer helpful website for validating/analyzing relations
• Overpass Opens Overpass at same viewport as currently seen on OSM website

… See full entry