Entspy is a program that lets you view and edit the entity properties of a compiled BSP map file (for Source Engine games such as HL2, CS:S and VtMB).
The program is useful for tweaking small entity properties (such as fog distance, etc.) without having to recompile a map. You can also use it to alter and add entities to the standard maps (such as increasing the number of spawnpoints). View and edit the entities of compiled map (.bsp) files.

A property and its value can be edited by clicking on the table entry or in the top four properties. (Note that no changes to the map are written to disk until the Save BSP menu command is performed.)

Requirements:
* Java

The license of this software is Freeware, you can free download and free use this file converter software.