STEAMID I/O lookup and convert your steamID, steamID3, steamID64, customURL and community id

input 76561197971003538 interpreted as steamID64 anchor
steamID
copy to clipboard STEAM_0:0:5368905
steamID3
copy to clipboard [U:1:10737810]
steamID64
copy to clipboard 76561197971003538
profile
view on Steamcommunity.com http://steamcommunity.com/profiles/76561197971003538
add friend