A common complaint: autocomplete works great in the browser — form fields fill in, the address bar predicts URLs — but switch to Word, Slack, or a plain Notepad window and it's gone. People often assume something is misconfigured or broken. It isn't. Windows was never built with a single, shared autocomplete system that every app plugs into.

Autocomplete Is a Per-App Feature, Not an OS Feature

Each app that offers autocomplete built it independently, for its own text fields, using its own logic. The browser's form autofill and address-bar prediction are Chrome, Edge, or Firefox features — they run inside the browser process and only see text typed into the browser's own fields. Word's suggestions are a Word feature. Outlook's are an Outlook feature. None of them talk to each other, and none of them extend past the app that built them.

Windows itself doesn't provide a shared autocomplete engine that apps can opt into. There's no equivalent of, say, spell-check, which at least has some OS-level plumbing many apps hook into. Text prediction is left entirely to individual app developers, and most desktop apps — messengers, note-taking tools, terminals, general editors — never built it at all.

Why it feels like a bug: because browsers are the app people use most and their autofill is genuinely good, it sets an expectation that Windows "has autocomplete." What you actually have is one app with strong autocomplete, and dozens of others with none.

What's Actually Happening When Autocomplete "Stops"

Each app owns its own text box

A text field in Slack and a text field in the browser are rendered by completely different code, with no shared suggestion engine between them.

No Windows-level API for it

There's no system service an app can call to get "the next word" the way it can call the OS spell-checker or clipboard.

Browser autofill only knows form history

It repeats values you've typed into that exact field before — it isn't predicting new sentences, so it has nothing to offer outside forms.

Checking Whether an App Has Its Own Setting

Before assuming nothing can be done, it's worth checking whether the specific app you're in has a hidden autocomplete toggle — some do, buried in settings. Word's is under Options → Proofing or AutoCorrect. Outlook has separate toggles for name autocomplete and suggested replies. Most messengers and general-purpose editors, however, genuinely have no such setting, because they never built the feature. In that case there's nothing to turn on — the gap is real, not a hidden switch.

Getting Autocomplete Outside the Browser

The only way to get consistent sentence-level suggestions across apps that don't build it themselves is a tool that sits above all of them — watching the caret system-wide instead of being wired into one app's codebase. That's what Typeahead does: it runs quietly in the system tray and suggests how your current sentence might continue in WhatsApp, Telegram, Slack, Chrome, Edge, Firefox, Outlook, Thunderbird, Word, Notepad, Notepad++, and VS Code's chat and text panes.

Suggestions come from a local LLM (Qwen 3 via llama.cpp), or from custom snippet autocorrect and dictionary-based autocomplete that work even before a model is downloaded — all fully offline, with typed text never leaving the device. Accept a suggestion with Tab (default, configurable), or keep typing to ignore it. It can be turned off per app, and password managers and financial apps are excluded automatically.

Frequently Asked Questions

Is Windows autocomplete actually broken outside the browser?
No — it was never built system-wide. Autocomplete is implemented separately by each app, and most desktop apps other than the browser simply don't include the feature.
Why does Word have autocomplete but Notepad doesn't?
Word invested in text prediction as part of its Editor and AutoCorrect features. Notepad is a minimal plain-text editor with no such feature built in — there's no shared Windows service that would give it one automatically.
Is there a Windows setting that turns on autocomplete everywhere?
No single system setting does this. Some apps have their own local toggle for their own autocomplete; there's no OS-wide switch because there's no OS-wide autocomplete engine to switch on.
Does Typeahead replace each app's built-in autocomplete?
It runs alongside them. Typeahead can be disabled per app, so you can keep an app's native suggestions and turn Typeahead off there, or use Typeahead in apps that have no suggestions at all.
Does this work without an internet connection?
Yes. Once a model is downloaded, Typeahead generates suggestions fully offline using a local LLM (Qwen 3 via llama.cpp). Snippets and dictionary autocomplete work even before any model is downloaded.

Get Typeahead

One-time purchase, no subscription. Windows 10 / Windows 11. 7-day free trial.

 Get it on Microsoft Store