Add an install prompt to Webflow
To add an install prompt on Webflow, paste the InstantPWA snippet into Site Settings → Custom Code via Project Settings → Custom Code → Head Code. The popup captures the browser's native install signal where supported and falls back to a guided walkthrough on iOS Safari, so every visitor sees a clear path to installing your Webflow site as an app.
Steps
- 1
Open Site Settings → Custom Code
Go to Project Settings → Custom Code → Head Code.
- 2
Paste the InstantPWA snippet
Drop the one-line async script tag in the Webflow head section — no build step or dependency install.
- 3
Configure the trigger
In your InstantPWA dashboard, set when the popup appears — on page load, after N seconds, or after a scroll/engagement threshold.
- 4
Publish
Save/publish in Webflow so the change goes live — most builders require an explicit publish step before custom code runs.
- 5
Verify on a phone
Open your live Webflow URL on a mobile device (not the editor preview) to confirm the popup renders.
Constraints to know
- Custom Code requires a paid Webflow site plan — it's disabled on the free starter plan even with hosting connected.
- Changes to Head/Footer Code only take effect after you click Publish; the Designer preview does not run custom code.
FAQ
Does the install prompt work on iOS Webflow visitors?+
iOS Safari never fires the native beforeinstallprompt event, so InstantPWA shows a share-sheet walkthrough instead — visitors still get a clear add-to-home-screen path.
Will this conflict with other scripts on my site?+
No — InstantPWA is a single first-party async script with no third-party dependencies, so it doesn't block or compete with analytics or chat widgets.
Do I need to touch anything else in Webflow besides Project Settings?+
No — the head snippet is the only integration point; InstantPWA hosts the manifest and service worker for you.