The ship got underway for the [[Marshall Islands]] on the 31st; arrived at [[Eniwetok Atoll]] on 10 August; and remained there through mid-September. During her stay at Eniwetok, the [[Surrender of Japan|surrender]] of [[Japan]] brought World War II to a close. Meanwhile, the ship, herself, serviced the [[fleet carrier]]s [[USS Wasp (CV-18)|Wasp (CV-18)]], [[USS Antietam (CV-36)|Antietam (CV-36)]], and [[USS Intrepid (CV-11)|Intrepid (CV-11)]]; the light fleet carrier [[USS Cabot (CVL-28)|Cabot (CVL-28)]], and a half-dozen [[Escort aircraft carrier|escort aircraft carrier's]], overhauling aviation equipment and returning it to stock for reissue. The material that could not be stored on board—bulky items such as drop tanks and the like—was stored ashore in a depot on .
The end of the war had removed the necessity for the replenishment of fast carrier task forces in the fleet anchorage in the Marshall Islands and [[Gilbert Islands]] advanced base sites, but there still remained the [[occupation of Japan]]. Webster accordingly departed Eniwetok on 13 September, bound via [[Guam]] for [[Tokyo Bay]], where she arrived on the 26th. There, Webster serviced all naval aviation activities in the Tokyo Bay area, including the carriers [[USS Yorktown (CV-10)|Yorktown (CV-10)]], [[USS Shangri-La (CV-38)|Shangri-La (CV-38)]], [[...|Bon Homme Richard (CV-31)]], [[USS Boxer (CV-21)|Boxer (CV-21)]], [[USS Munda (CVE-104)|Munda (CVE-104)]], and [[USS Hoggatt Bay (CVE-75)|Hoggatt Bay (CVE-75)]]; the aviation units of [[battleship]]s [[USS New Jersey (BB-62)|New Jersey (BB-62)]], [[USS Tennessee (BB-43)|Tennessee (BB-43)]], [[USS California (BB-44)|California (BB-44)]]; those of the [[heavy cruiser]]s [[USS St. Paul (CA-73)|St. Paul (CA-73)]] and [[USS Quincy (CA-71)|Quincy (CA-71)]]; and finally the planes of 10 [[light cruiser]]s. In addition, the aircraft repair ship serviced the planes from Marine Air Group 21 and assisted the board headed by Rear Admiral Frederick W. Pennoyer in its investigations into the development of [[...|Japanese aircraft]] and aircraft engine design in World War II.