Steam Key Checker

Valve is explicit about the publisher column. Its Steam Keys documentation says “you can query only a single key at a time”, that only accounts with the “Generate Steam Keys” permission may do it, and that a key from someone else’s batch simply comes back as invalid. That is why every genuine activation checker — ours, and the paid browser extensions — runs inside the publisher’s own Steamworks session. A site that offers to check any key against Steam for anyone is claiming something Valve does not provide.

Those three are quoted from the client’s text (“Keys look like the following”), which you can read in the Steam client strings. The 25-character form is the one Valve says boxed games print, “on the DVD jewel case, manual cover, disc insert or inside the case”. What Valve does not document: the character set, whether keys are case-sensitive, or a checksum. A key can therefore have a perfect shape and still be fake or used — format checking catches typos and the wrong kind of code, nothing more.

When a key is typed from a card or box, these are the characters Valve says people confuse. The checker lists the ones in your keys when you tick “I typed these by hand”.

Per key, Steamworks tells you whether a key is activated and when, with its package and tag — one lookup at a time on the Query Steam Key page. The activation report above runs that lookup for a whole list.

Per country, Steamworks reports in aggregate only. Valve says publishers have always seen “Steam Key activation data grouped by tag and by country” (Sales Data API announcement), and on 2 September 2026 it added a key-activations chart to each game’s landing page “with a toggle between region and country of activation” (Steamworks announcement). No report ties a country to an individual key. So record where every key went — the channel, the partner, the market — and load that list with your results: the report then shows the activation rate for each, and a batch whose rate is out of line with its neighbours is the one to look at.

Tag everything. Valve’s own advice: “It’s very important to tag your keys correctly so that you can keep track of them in the future.” Tags are what both Steamworks’ charts and this report group by.

Banning is a blunt tool. Steamworks lets you ban a whole batch or only its unactivated keys, in files of up to 10,000 keys, but Valve warns: “You should never ban or disable Steam keys that have been legitimately sold to customers.” The unused-keys list in the report is the safer starting point.

Limits worth knowing: up to 5,000 Default Release keys before requests are reviewed case by case, beta keys “generally limited to 2,500 total”, and a 3-week wait after a first game’s AppID is created before any keys can be requested.

A key that was obtained fraudulently can be revoked by its publisher, and Valve is clear about who pays: the game is removed, “Your account will not be restricted”, and Valve has “no way to issue refunds for purchases made outside of Steam” (Revoked CD Keys). The Steam Subscriber Agreement sends every question about a key bought from a reseller back to that reseller. So the seller matters more than the price: buy where you can get a replacement or a refund if Steam says the key is used.

Virtwave sells Steam games as keys and Steam Wallet codes as digital codes, delivered by email. If you only need to top up a wallet, a digital code avoids the question entirely — and it is worth knowing that Valve’s Steam Wallet FAQ now says physical Steam gift cards are being withdrawn from shops, with retailers expected to be out of stock by the end of 2026.

Steam games and wallet codes on Virtwave · $20 Steam Wallet code (US) · $50 Steam Wallet code (US)

Valve publishes much less about Steam keys than the rest of the web suggests. We could not find a Valve page that states the character set, whether keys are case-sensitive or how long an activation lock lasts. The only format statement is three example keys in the Steam client’s own activation dialog, and that is all this checker relies on. Claims that keys “never contain O or 0” or that the lock is “exactly one hour” come from third-party sites, not Valve.

The error messages here are Valve’s own text, read from the script that runs Steam’s Activate a Product page on 24 September 2026, not paraphrased from forum posts. Two details surprised us. The “30 minutes” in Steam’s advice belongs to the generic unexpected-error message, not the too-many-attempts lock. And the lock applies to your internet address as well as the account.

Every tool we found that genuinely reports whether a key was activated works the same way: it runs inside the publisher’s own Steamworks session, because nothing else can see that data. Some sites offer to “check any Steam key against Steam” for anyone. Valve documents no way to do that, so treat those results with suspicion — and never paste keys into a checker that sends them to its server.

Country data trips people up. Steamworks does report where keys were activated — by country and region, grouped by tag — and a new chart for it arrived on 2 September 2026. But it never ties a country to an individual key. The practical way to see where a batch leaked is the one this report uses: record where you sent each key, then compare activation rates by channel and country.