Many users find old software keys in their emails or documents but don't remember what they were for. This tool helps you identify the likely software platform (like Microsoft, Steam, etc.) by analyzing the structure of the key, such as its length and character groups.

Yes, it is 100% safe and private. All analysis happens instantly within your browser. The key you enter is never sent to our server, and we do not save, store, or log any data you input. Your privacy is guaranteed.

No. This is a critical point. This tool is a format identifier, not a validator. It can tell you "this *looks like* a Windows key," but it cannot tell you if it's a legitimate, working key. To check a key's validity, you must try to activate it with the corresponding software.

It uses a set of predefined patterns (known as regular expressions) to match the structure of your input. For example, it knows that a standard Microsoft key has five groups of five alphanumeric characters, while a Steam key typically has three groups of five. It compares your input against these known patterns to make an educated guess.

If your key is not identified, it could mean one of several things:

• It's for a less common software that isn't in our database of patterns.
• The key format is proprietary or unique.
• There might be a typo in the key you entered. Please double-check it for accuracy.