Build an Offline HTML Android App: Working Example

An HTML app can work offline when everything it needs is bundled in the page. Web2Apk accepts self-contained HTML and text sections. It does not automatically download a website, its linked assets, or its backend for offline use.

Updated 19 September 2026 · About these guides

Start with a self-contained page

The counter example below includes a viewport setting, inline CSS, and a small JavaScript button handler. It has no network requests or external dependencies. Its counter is intentionally kept in memory and resets when the page reloads; it is a connectivity test, not a persistent-data example.

Import and build the example

Download the HTML file, open the HTML to APK converter, enter an app name, and select the file. Create the project, save your settings, then create or unlock a signing key in Build. Generate an APK, download it, and install it on your Android test device.

Check every dependency in your own page

A stylesheet link, script source, image URL, web font, video, or fetch call may still point outside the HTML. Files next to your HTML on your computer are not automatically imported. Inline small assets or keep those features online. The importer accepts a single file up to 100,000 bytes; embedded images can quickly consume that space.

Test a fresh launch without internet

Do not rely on a successful online preview. Disable the device connection, close the installed app, then reopen it and use every control. Check each HTML or Text section. If a feature stops working, inspect its external dependencies and compare against the small example.

Know the difference between offline pages and an offline builder

Bundled pages can operate without a network connection when their dependencies are included. The builder itself downloads its website files, Android templates, and signing runtime. This guide does not promise that the builder will load and generate packages without internet.

Replace the example gradually

Change the heading, styles, and button behavior before adding larger content. Build and test again after adding each dependency. Export the project and encrypted signing-key backup so you can reproduce the app and issue updates later.

A working offline HTML example

Save this file, import it in HTML mode, and build an APK. The button increments a counter without fetching any resources.

Download offline-counter.html · Open HTML to APK

<!doctype html>
<html lang="en">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<meta name="robots" content="noindex,follow">
<title>Offline counter example</title>
<style>
  body { font: 18px/1.6 system-ui, sans-serif; margin: 2rem; background: #f4f1ea; color: #183c30; }
  button { font: inherit; padding: .7rem 1.2rem; border: 0; border-radius: .5rem; background: #0d6550; color: white; }
</style>
<h1>My offline counter</h1>
<p>This page uses no external files or network requests.</p>
<button type="button" id="add">Add one</button>
<p aria-live="polite">Count: <output id="count">0</output></p>
<script>
  let value = 0;
  document.getElementById('add').addEventListener('click', () => {
    document.getElementById('count').textContent = String(++value);
  });
</script>
</html>

Checklist

Download the example and import it using HTML mode.
Build an APK and install it on an Android test device.
Enable airplane mode and disable Wi-Fi.
Close and reopen the app, then press the counter button.
Repeat with your own HTML and every feature you plan to distribute.

Create app All guides