XEdit

xEdit is an external tool that allows viewing and modifying of data files for games from the Fallout series since Fallout 3.

It was originally written by ElminsterAU for Morrowind, the 3rd game from The Elder Scrolls series, and has since been adapted to Bethesda's subsequent games, which use the same game engine concepts: Gamebryo (Construction Kit) for Morrowind, Oblivion, Fallout 3 and Fallout: New Vegas, and Creation (Kit) for Skyrim, Fallout 4 and Skyrim's Special Edition.

The Vault uses it to extract the contents for the raw game data pages.

For further information please visit the tool's own wiki, a subsection of the Creation Kit wiki.

Though the latest version applies to all games, the actual app has to be renamed to work with each specific game. Ready to use downloads are available on nexus mods:
 * FO3Edit for Fallout 3
 * FNVEdit for Fallout: New Vegas
 * FO4Edit for Fallout 4