🔍 Compatibility

Android WebView Compatibility Checker

Paste your website URL and get an instant report. Know exactly which issues will break your WebView app — before you build.

✓ ✗ ! ✓ ✓

Enter any public URL. The checker fetches the page server-side to inspect headers and content.

Checking your site for WebView compatibility…

What gets checked

7 compatibility checks, explained

HTTP Response Code

The server must return a 200 OK. A 401, 403, or 5xx means users will see an error screen inside the app.

X-Frame-Options / CSP Headers

If set to DENY or SAMEORIGIN, Android's WebView will refuse to load the page and show a blank white screen.

HTTPS Encryption

Apps on Google Play must use HTTPS. An HTTP URL will trigger a mixed-content warning and may be blocked.

Mobile Viewport Meta Tag

Without <meta name="viewport">, the page renders at desktop width inside the app and appears tiny.

Login Wall Detection

If the first screen requires a login, users who haven't created an account will hit a wall immediately on open.

Response Time

Pages over 4 seconds feel broken on a mobile network. The app should load in under 2 seconds for a good first impression.

HTML Content Volume

Pages that render entirely via JavaScript may appear blank on slow connections. Server-rendered HTML loads reliably in WebView.

FAQ

WebView compatibility questions

What is an Android WebView app?
A WebView app is an Android application that loads your website inside a native Android shell using the WebView component — essentially a chromeless browser built into the app. This is how tools like Free App Maker work: your website URL is wrapped in a signed APK.
What does X-Frame-Options mean and why does it matter?
X-Frame-Options is an HTTP response header. When set to DENY or SAMEORIGIN, it prevents your page from loading inside a WebView — causing a blank white screen. Remove this header or replace it with a Content-Security-Policy that allows your own domain.
My site failed the check — what do I do?
Each failed check shows a plain-language reason. The most common fixes: (1) Remove or adjust the X-Frame-Options header in your web server or CDN settings. (2) Add <meta name="viewport" content="width=device-width, initial-scale=1"> to your HTML. (3) Make your site publicly accessible without a login. (4) Improve load speed with a CDN or image compression.
Does checking my site store any data?
No. The checker fetches your URL to inspect HTTP headers and page content, then discards the result. We do not store URLs or results. The check is anonymous.
My site passed all checks — can I build my Android app now?
Yes. A passing score means your site is WebView-compatible. Paste the same URL into Free App Maker and your signed APK is ready in about 60 seconds.

Site passed? Build your app now.

Paste the same URL into Free App Maker and your signed Android APK is ready in 60 seconds.

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