Microsoft is embedding generative AI directly into Windows Notepad, the bare-bones text editor that has shipped with the operating system for decades. The update, now in testing with Windows Insiders, adds three on-device capabilities—Summarize, Write, and Rewrite—that work entirely offline on Copilot+ PCs, no Microsoft account or subscription needed. It’s the clearest signal yet that Redmond intends to make local AI processing a defining feature of its premium hardware.

What’s actually landing in Notepad

Notepad version 11.2508.28.0, rolling to Canary and Dev channel Insiders this month, introduces a Copilot menu and right-click shortcuts for three generative tools:

  • Summarize: Select a block of text and the tool condenses it into short, medium, or long summaries. It can also extract action items, making it handy for meeting notes or long logs.
  • Write: Provide a prompt—like “draft an email apologizing for a delayed shipment”—and Notepad generates original text. You can also expand a fragment into paragraphs, lists, or formatted templates.
  • Rewrite: Highlight existing content and ask for a tone adjustment (more formal, casual, persuasive) or a variation in length. It returns multiple alternatives you can cycle through.

On Copilot+ hardware, these operations are processed by the device’s Neural Processing Unit (NPU), keeping your text from ever touching Microsoft’s servers. The NPU works alongside the CPU and GPU, but the critical point is that inference happens locally. For machines without Copilot+ certification, the same features fall back to cloud models—and that often means signing in with a Microsoft account and holding a Microsoft 365 subscription.

A split Windows: Copilot+ is the gatekeeper

Microsoft’s decision to tie local AI to Copilot+ certification creates a two-tier experience on identical Windows 11 installs. Copilot+ isn’t a software toggle; it’s a hardware-and-firmware standard that OEMs build into the machine. Currently, that includes devices with Snapdragon X-series processors, Intel Core Ultra chips with integrated NPUs, and AMD Ryzen AI silicon—all delivering the 40+ TOPS (trillion operations per second) that Microsoft considers the floor for interactive local inference.

If you bought a premium laptop in the last year, check your specs: a Copilot+ sticker or listing isn’t guaranteed. For everyone else, Notepad’s AI will rely on the cloud, reintroducing latency, potential subscription costs, and privacy considerations. This stratification is likely to become a recurring theme as Microsoft rolls out more on-device AI features across Windows, including in Paint, Photos, and the Snipping Tool.

What it means for everyday users

For home users with Copilot+ devices, the impact is immediate and low-friction. You no longer need to copy text out of Notepad into a web-based AI tool for quick polishing or summarization. The app remains lightweight—it’s still Notepad—but now it can handle mundane rewriting tasks that previously sent you to a browser.

Crucially, local processing means you can use these features offline, on a plane or in a spotty cellular zone, and you aren’t feeding sensitive notes to a remote server. If you’re drafting personal journal entries, confidential work memos, or creative writing, that’s a meaningful upgrade. And because no subscription is required on Copilot+ hardware, you won’t hit a paywall after a certain number of queries.

For users with standard Windows 11 PCs, the experience is more guarded. You’ll likely see the same menu options, but tapping them will prompt a sign-in and could consume Microsoft 365 credits. The quality of cloud-based results may differ from the local model—Microsoft hasn’t published comparisons—so it’s worth testing both if you have access.

If you prefer the classic, no-frills Notepad, Microsoft has included an in-app toggle to disable the AI features entirely. That’s a welcome nod to the tool’s legacy as a distraction-free scratchpad.

What administrators need to plan for

Enterprise and education IT teams face a more complex picture. The local model reduces some data-sovereignty concerns, but it doesn’t eliminate governance work:

  • Data flow mapping: While Summarize, Write, and Rewrite can run locally, other Copilot integrations in Windows (like web search or Visual Search) still send data to Microsoft. You’ll need to audit which actions trigger cloud calls and update data-loss prevention (DLP) rules accordingly.
  • Model risk: On-device AI isn’t immune to hallucinations. For regulated environments, treat all AI-generated text as a draft requiring human review. Establish label-and-verify workflows before any external use.
  • Storage and updates: Local models occupy disk space and will need periodic updates, similar to language packs or security definitions. Microsoft hasn’t specified the model’s footprint, so plan for additional storage overhead on Copilot+ devices.
  • Hardware refresh cycles: If your organization doesn’t have Copilot+ hardware, Notepad’s AI will route through cloud services, which may require Azure/365 licensing and consistent connectivity. This could accelerate refresh timelines or, conversely, lock you into a suboptimal cloud-only path until your fleet turns over.

Because Microsoft hasn’t released full technical documentation—model architecture, parameter count, exact NPU utilization—IT departments should pilot the feature on a representative set of Copilot+ devices before broad deployment. Measure latency, accuracy, and resource impact, then update acceptable-use policies to reflect where AI assists are permitted.

How to try Notepad’s AI today

If you want to test the new capabilities before public rollout:

  1. Enroll in Windows Insider: Go to Settings > Windows Update > Windows Insider Program and select the Dev or Canary channel. Canary builds are least stable but receive features first.
  2. Update Notepad: After enrolling, check the Microsoft Store for updates, or wait for inbox app flighting. The version you need is 11.2508.28.0.
  3. Verify Copilot+ status: The device manufacturer’s specifications page should confirm Copilot+ certification. Look for references to an NPU and the Copilot+ badge.
  4. Run a test: Open Notepad, type or paste some text, and right-click or open the Copilot menu. Try Summarize, Write, and Rewrite with different content. If you have a Microsoft 365 subscription, compare cloud results by signing in (cloud fallback will engage automatically on non-Copilot+ PCs).
  5. Opt out if needed: Inside Notepad, you can disable AI features in the app settings—no registry hacks required.

Note that local processing is currently limited to English. Cloud models support more languages, but Microsoft hasn’t announced timelines for local multilingual support.

How we got here

Notepad’s AI integration didn’t appear in a vacuum. Over the last two years, Microsoft has shipped tabs, spell check, autocorrect, and a dark-mode refresh for the editor, steadily modernizing what was essentially frozen UI for a generation. At the same time, the company invested heavily in its Copilot brand, blending OpenAI-powered cloud models into Edge, Office, and Windows Search.

Earlier AI experiments in inbox apps—like Paint’s Cocreator or the Photos app’s background blur—mostly required cloud round-trips and, often, Microsoft 365 subscriptions. The Notepad update marks a deliberate pivot to on-device intelligence specifically on Copilot+ devices, a hardware class Microsoft began evangelizing in early 2024 as a new baseline for AI PCs. By surfacing these features in Notepad—an app with zero learning curve and near-universal usage—Microsoft is betting that everyday users will experience the NPU’s value without having to open a specialized tool.

What to watch next

The Notepad rollout is an iceberg tip. Microsoft has confirmed plans for on-device AI in Photos, Paint, and the Snipping Tool, all leveraging the same Copilot+ hardware stack. Expect similar hybrid workflows: local for basic tasks, cloud for advanced editing or content generation.

Critical unknowns remain: the local model’s resource consumption, update cadence, and real-world quality versus the cloud version. Third-party benchmarks will be essential for enterprise decision-making. Additionally, watch for Microsoft to clarify whether Copilot+ certification will appear on mid-range laptops (beyond the current premium segment) and whether the 40+ TOPS threshold might shift as NPUs evolve.

For users, the immediate takeaway is practical: if you own a Copilot+ PC, Notepad just got a lot smarter without sacrificing its speed or privacy. For everyone else, it’s a preview of a future where features hinge on hardware specs you can’t just download.