SteamID.iosteamid.io
Converts Steam vanity URLs, profile links and IDs to all SteamID formats (SteamID, SteamID3, SteamID64) and shows profile status and creation date.
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tools / xboxgamertag
XboxGamertag
Looks up an Xbox gamertag and shows its avatar, gamerscore, recently played games and gaming history.
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