Is STEAMID I/O affiliated with Valve?

Updated

No. STEAMID I/O states on its own site that it is not affiliated with Valve, and that all trademarks and registered trademarks belong to their respective owners. It is an independent SteamID converter and profile lookup tool, not an official Valve service.

What the site actually says

The disclaimer on steamid.io is short and direct:

  • Not affiliated with Valve — the tool presents itself as independent.
  • Trademarks belong to their owners — names and marks used on the site are not claimed by STEAMID I/O.

That wording matters if you are deciding whether to treat the site as an official source. It is not. It is a third-party utility that works with Steam identifiers.

Where the data comes from

STEAMID I/O credits three sources for how it works:

Source Role
Valve Provides an API
xPaw Provides a reliable steamID library
voogru Posted about the algorithm on the Allied Modders forums

So the tool is built on a Valve API plus community-contributed code and a publicly discussed conversion algorithm. The API connection explains why lookups can return real Steam Community profile data, but it does not make the site part of Valve.

What this means for you

  • For casual lookups and conversions, the distinction rarely matters. You enter a SteamID, steamID3, steamID64, or customURL and get the corresponding values or a community profile link.
  • If you need an authoritative or official record, go to Steam itself. STEAMID I/O is a convenience layer, not a source of truth about your account.
  • If you are evaluating reliability, the useful signal is the stated dependency on a Valve API and a known community library — not any claim of official status, because no such claim is made.

Quick check

If you ever want to confirm the relationship yourself, open steamid.io and read the footer or about section. The non-affiliation statement and the trademark notice are published there, alongside the credits to Valve, xPaw, and voogru.