Built a calculator, a quiz, a landing page or a small game in a single HTML file? Upload it and download a signed Android app. Check the file below first so nothing goes missing.
<!doctype html> <html lang="en"> <head> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Tip Calculator</title> <!-- styles inline: nothing to fetch --> <style> body { font: 16px system-ui } </style> </head> <body> <main id="app"></main> <!-- a CDN library is fine; it needs a connection --> <script src="https://cdn.jsdelivr.net/npm/…"></script> <script> /* your code */ </script> </body></html>
Free checker
The converter uploads exactly one file. Anything your page loads with a relative path (style.css, img/logo.png, about.html) is not part of that upload. The checker lists those paths before you convert.
url() backgrounds and fontsYour first successful build is free. Uploaded HTML is hosted for a 7-day trial; keep it online longer with Hosted Site.Pricing
Preparing the file
When your page is hosted, the converter adds a mobile viewport tag if it is missing and turns off pinch zoom, so the app feels like an app. Your layout still has to work at 360–430px wide. If you write the tag yourself, use:
<meta name="viewport" content="width=device-width, initial-scale=1">
Put CSS in a <style> block and scripts in <script>. Small images and icons can be SVG or base64 data URLs. Libraries can stay on a CDN with a full https:// address.
A single upload can be up to 10 MB. Base64 makes images about a third larger, so move big images and audio into a ZIP project instead.
localStorage and IndexedDB persist between launches because each uploaded app has its own origin. Save scores, drafts and settings there rather than in memory.
<input type="file"> opens the Android file picker, and links to generated files (blob: or data:) download to the Downloads folder. A download attribute sets the file name.
Make buttons at least 44px tall, avoid menus that only open on hover, and keep important controls away from the screen edges where Android gestures live.
HTML5 games and toys
Canvas and WebGL games are a natural fit. Turn on the full-screen option in the converter so the status and navigation bars stay out of the way.
window.innerWidth and listen for resize, because phones rotate.localStorage so it survives the app closing.Pick an input
| Your project | Use |
|---|---|
| One page, everything inline or on a CDN | HTML to APK (this page) |
| Several pages, an images folder, a framework build | ZIP to APK |
| Already online at an https:// address | Website to APK |
Uploads are hosted as static files. PHP, Node.js or Python code inside an HTML project is not executed, so forms that post to a server script need an external backend.
FAQ
Not by default. Your HTML is hosted by WebToApp and the app loads it from there, so it needs a connection. A page that registers its own service worker can cache itself after the first visit, but test that on a phone.
Uploaded HTML and ZIP sites are hosted for a 7-day trial. To keep an uploaded app working after that, add Hosted Site from the pricing page. Apps built from a URL use your own website and do not need it.
Yes. The app runs your page in Android System WebView, a current Chromium engine, so modern JavaScript, canvas, WebGL, Web Audio, localStorage and IndexedDB work as they do in Chrome on Android.
Use a ZIP. A single upload contains one HTML file only, so links to other .html files break. Put all pages and assets in one folder, name the first page index.html and use ZIP to APK.
Yes. Each uploaded app runs on its own web origin, so its storage survives restarts and is not shared with other apps. Clearing the app’s storage in Android settings erases it.
Exported HTML5 builds from engines such as Phaser, PlayCanvas or Construct usually work when they are a single file or zipped with their assets. Very large exports may exceed the 20 MB unpacked limit.