How to interactively simplify polygon and polyline datasets?

Recently, I need simplify a couple of shapefile maps so that they can be loaded into  mobile reports for SQL Server 2016 Reporting Services.

Mapshaper’s web interface comes to the rescue. The latest version of the web interface is online at http://www.mapshaper.org. Mapshaper works in recent versions of Chrome, Firefox, Internet Explorer and Opera. If you encounter out-of-memory errors while editing a large file, try Firefox, which has been used successfully with Shapefiles larger than 1GB.

I am surprised that maps of over 50MB can sometimes be reduced to less than 1MB. It is therefore very useful for creating lighter weight maps suitable for online publishing (for example, for web-based interactive maps). MapShaper also has options for repairing intersections and preventing shape removal.

Simplification recommendations:
I would like to recommend the Visvalingam simplification with a custom weighting for making maps because it generally does a better job of removing details that are too small to be displayed clearly.