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If you've ever needed to write a system prompt on your phone — maybe you're testing a chatbot during a commute, or your laptop is in another room — you know that most AI prompt tools don't work on mobile. They're Chrome extensions, or desktop apps, or paywalled SaaS. The free system prompt generator runs in any browser on any device with no install.
Works on every device. No app install.
Open System Prompt Generator →| Platform | Browser | Status | Notes |
|---|---|---|---|
| Mac | Safari | Works | Native browser, fastest on Apple Silicon |
| Mac | Chrome | Works | If you already use Chrome |
| Mac | Firefox | Works | Privacy-friendly |
| iPhone | Safari | Works | Default browser on iOS |
| iPhone | Chrome | Works | Same engine as Safari on iOS |
| iPad | Safari | Works | Larger form factor helps for long prompts |
| Windows | Edge | Works | Default browser, good performance |
| Windows | Chrome | Works | Most popular on Windows |
| Windows | Firefox | Works | Open source alternative |
| Linux | Firefox | Works | Default on most distros |
| Linux | Chromium | Works | Open source Chrome |
| Chromebook | Chrome | Works | Native browser |
| Android | Chrome | Works | Default Android browser |
| Android | Firefox | Works | Privacy-focused alternative |
The reason it works everywhere is simple: it's a single HTML page with client-side JavaScript. No native code, no platform-specific binaries, no Chrome extension API, no iOS app store distribution.
If you're building an AI app — a chatbot, an agent, an assistant — you'll iterate on your system prompt dozens of times. The friction of "I need to switch to my desktop to edit the prompt" adds up. Being able to:
...all without any setup, makes prompt iteration fundamentally faster.
On iOS, Safari handles the generator natively. The use-case grid wraps to 2 columns on phones, and the rule toggles flow into a scrollable row. The output box is selectable and the Copy button uses the iOS clipboard API.
To use it on iPhone:
The "Add to Home Screen" trick gives you a dedicated icon that opens the generator like a native app. It's not a real app — it's a browser shortcut — but the user experience is essentially the same.
On Mac, both Safari and Chrome work identically. Safari is faster on Apple Silicon (M1/M2/M3/M4) and uses less battery, so it's the default recommendation. Chrome has the advantage of syncing your tabs across devices if you use it everywhere else.
For Mac developers, there's no benefit to a desktop app for this — the browser version is faster to launch and easier to share.
Edge has been the default Windows browser since Windows 10. It's based on Chromium and runs the generator perfectly. Chrome works equally well. Firefox is the open-source alternative.
None of them need administrator privileges — you can use the generator on a locked-down corporate Windows machine where you can't install apps.
Linux users tend to prefer browser-based tools because installing platform-specific apps on Linux often involves dependency chains. The generator is just a URL — no .deb, no .rpm, no flatpak, no snap.
It works on:
Chromebooks are browser-only by design, so they can't run desktop AI prompt apps at all. They can run Chrome extensions, but those only work in ChatGPT, not Claude or Gemini. A pure browser-based generator works perfectly on Chromebook for any AI model.
Same story as iPhone: Chrome and Firefox both work. The use-case grid adapts to small screens and the Copy button uses the standard clipboard API. Add to Home Screen creates a shortcut that opens the generator like an app.
One caveat: the generator runs locally once the page is loaded, but you do need internet to load it the first time. After that, the page is cached by your browser and you can generate prompts offline. To force-cache it for offline use, open the page once on each device while you have internet — most modern browsers will cache it automatically.
Generate system prompts on any device.
Open System Prompt Generator →