I would like to know about conversion tools available for KML to shapefile formats. In ArcMap 9.3.1
closed as too broad by John Powell, PolyGeo♦ Jul 29 '15 at 10:10
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
I don´t know if ArcMap 9.3.1 has the tool. But there is a Tool called "KML to Layer". You need tho export the temporary layer to shp.
If not use this online conversion: http://www.zonums.com/online/kml2shp.php
In the Online Help for ArcGIS 9.3.1 there is a page that discusses its KML support:
Importing KML into the geodatabase for use in ArcMap, ArcGlobe or ArcScene See the Data Interoperability Extension. Alternatively, see how the user community is supporting KML by reviewing live search results for KML in ArcScripts