Microsoft has told developers how to use a new tool on Windows 11. This tool is not active yet. It will let apps ask Windows for a user’s age group.
It can also tell apps if that age was checked by an outside identity provider. Microsoft says this move fits with a bigger push for digital ID checks happening around the world.
How the New Windows Age Tool Works
The tool works through something called an API, a channel that lets apps talk to Windows. This age API sorts users into five groups. These groups are under 10, 10 to 12, 13 to 15, 16 to 17, and 18 and over, according to Microsoft’s developer documentation.
The API also returns a second piece of information. It shows if a user’s age was checked by an identity provider. This status can be read as Verified, Unverified, OptedOut, TemporarilyUnavailable, or NotApplicable. Microsoft has not named who these identity providers will be. The company also has not said what proof they will need to check someone’s age.
Microsoft frames this tool as good for privacy. Apps can learn a user’s rough age group. They will not see a full birth date or other private details. The company calls this a privacy-friendly way to help apps follow child safety rules, based on Microsoft’s own framing of the feature. Still, critics argue that steps like this help normalize age and ID checks across everyday tech.
Apps could use this age signal in several ways. A social app could adjust its chat tools for younger users. A shopping app could limit in-app purchases for kids. A streaming app could hide mature shows from younger viewers.
The tool will not work right away. Microsoft says it plans to switch it on later in 2026, based on Windows SDK release notes reviewed by TechRepublic. Right now, any app that calls the tool gets an empty answer. The age group shows as unknown. The verification status shows as unavailable.
This is a shift from Microsoft’s past stance. In January 2024, the company sounded far more cautious about age-checking tech. A Microsoft blog post at the time said there was no clear technical fix yet. The post warned that age checks could bring real risks to security, privacy, and basic rights.
Where This Fits a Bigger Push
Governments are already building rules that match this kind of tool. California passed its own law on this topic. The law, known as the Digital Age Assurance Act, is also called AB 1043. It became active on January 1, 2027, based on the bill’s official legislative record.
Assemblymember Buffy Wicks wrote the bill. She has said the law tries to balance two goals. It aims to protect kids online while still respecting privacy and ease of use, according to her public comments on the bill. Under the law, device makers must send an age range to app developers. This happens when someone downloads and opens a new app.
To use Microsoft’s tool, developers must sign up first. They must register with Microsoft’s Digital Safety platform and receive approval. Microsoft’s implementation guide for the age APIs also states that the tool only works when users sign in to a Microsoft account.
The push for digital identity verification comes amid rising cyber threats. Threat actor “Everest” claims to have stolen over 1TB of ASUS data and threatens to leak it on the dark web. ASUS has not confirmed the breach, and no independent verification exists.
Users Push Back on X
News of the tool spread fast on X, and many users reacted with anger. Several said they plan to leave Windows completely. User @BartStimsonX wrote that this gives them one more reason to boycott Windows. User @badkobold said simply to switch to Linux and call it solved.
Other users worried the same checks would soon reach Linux too. @LafaiVT argued that people who say “just use Linux” are missing the point. This user believes Microsoft will eventually build the same age checks directly into computer hardware. @civilian_actual warned that people could one day find themselves living under a full surveillance system and urged others to switch to Linux now.
Some users questioned how the checks would even work in practice. @iNeo_G predicted the system would get bypassed within minutes of launch. @Johneon52T guessed that Linux use could jump sharply, maybe from 10 percent up to 20 percent of users.
A few comments turned darker in tone. @DStateRespTeam compared the plan to a national ID system built into Windows. @Apocalyp1Skynet said the policy needs a legal challenge, possibly reaching the Supreme Court. User @darnstadium said flatly that they will not comply, and named a Linux-based system called Bazzite as their next move.
For now, Microsoft’s age tool exists only on paper. It cannot collect or share any real data yet. But the backlash on X shows many users are already bracing for the day it goes live.
