SteamID Formats Explained (SteamID64, STEAM_X:Y:Z, SteamID3)

Direct answer: Use SteamID64 (17 digits) or a full Steam profile URL when you need a reliable player lookup or report target. The older formats (STEAM_X:Y:Z and [U:1:Z]) can refer to the same account, but they’re easier to mistype and not every tool accepts them directly. If you’re unsure, paste the full profile URL first, then convert to SteamID64 if needed.

By SteamReport Team · · 6 min read · Updated August 2026 · Back to Blog

Quick Reference

  • SteamID64: 17-digit number. Most reliable to paste into lookups and reports.
  • Profile URL: https://steamcommunity.com/profiles/<steamid64>
  • Custom URL (vanity): https://steamcommunity.com/id/<name> (can change)
  • Steam2: STEAM_1:0:123456
  • Steam3: [U:1:246912]

How Conversion Works

All three formats (SteamID64, Steam2, Steam3) point to the same account. The conversion is a simple arithmetic mapping. Tools like SteamReport automatically resolve whichever format you paste, but starting with SteamID64 or a full profile URL avoids edge cases with older format parsing.

Need a practical converter workflow (copy from scoreboard/history, normalize, verify)? See the companion guide SteamID64 converter guide.

Common Mistakes

  • Pasting a display name (not unique) instead of a profile URL/ID.
  • Copying only part of a URL (missing /profiles/ or the digits).
  • Using a custom URL that no longer points to the same account.
  • Extra spaces or punctuation around the identifier.
  • Mixing up friends-list nicknames with the account you actually played against.

SteamReport.net Gotchas

On the report / lookup form, paste SteamID64 or the full profile URL first. If resolution fails, strip query strings, confirm you did not paste a vanity path that changed, then retry. For post-match identity hunting, also read how to find a Steam profile.

Use It in SteamReport.net

Filing a report: Report. Checking consolidated stats: CS2 stats.

Key Takeaways

  • Prefer SteamID64 or a full /profiles/ URL for lookups and reports.
  • Steam2/Steam3 can map to the same account but are easier to mistype.
  • Vanity URLs can change; nicknames are not unique identifiers.
  • Always open the profile once to confirm the correct target before reporting.

Read Next in This Cluster

FAQ

What is SteamID64?

It’s the 17-digit numeric identifier for a Steam account. It’s stable and commonly used by tools.

Is a custom profile URL the same as a SteamID?

No. A custom URL can change; SteamIDs identify the account more reliably.

Which format should I paste into SteamReport?

Prefer SteamID64 or a full steamcommunity.com/profiles/... URL. Partial URLs and nicknames fail.

Can two different formats point to the same account?

Yes. SteamID64, STEAM_X:Y:Z, and [U:1:Z] can identify the same account via arithmetic conversion.