Base64 Encoder Decoder (“the app”) converts text and files to and from Base64. This policy explains what the app does and does not do with data, on Android and on iOS.
Every conversion is performed by the app’s own code, entirely on your device, and works offline. Nothing you type, paste, encode or decode, and no file you pick, is sent anywhere by the app. Files you convert are saved only where you choose.
So that you can find them again, your recent conversions are kept in a History list stored only on your device (long inputs and results are shortened before they are saved). Deleting an entry, tapping Clear all, or uninstalling the app removes them. Your language, theme and output options are also stored only on your device.
The app reads your clipboard only when you tap its Paste button.
1. Advertising. The app shows ads via Google AdMob, with Meta Audience Network as a mediated partner. The ads SDKs may collect device identifiers (the Android advertising ID, or on iOS the IDFA — only if you allow tracking), coarse location derived from the IP address, and diagnostic signals to serve and measure ads. In the European Economic Area, the United Kingdom and regulated US states, ads are requested only after you make a choice in the consent dialog (Google UMP). On iOS, the system’s App Tracking Transparency prompt asks before the IDFA is used, and your answer can be changed at any time in iOS Settings → Privacy & Security → Tracking.
Google’s policy: policies.google.com/privacy · Meta’s policy: facebook.com/privacy/policy
2. Analytics and crash reporting. The app uses Google Firebase Analytics and Crashlytics to understand which features are used and to fix crashes. When you convert something, an analytics event records which feature you used, the size of the input and whether URL-safe output was on — never the content itself. These are not linked to your name, email or any account — the app has none — and are not used for advertising. Crash reports contain stack traces and device model information, never your text or files.
Firebase’s policy: firebase.google.com/support/privacy
3. Notifications (optional). After your first conversion the app asks whether it may send notifications. If you allow it, the app registers with Firebase Cloud Messaging (via Apple Push Notification service on iOS) so it can receive occasional announcements; this creates a push token for your device. Declining or later disabling notifications in system settings stops them. Notifications never contain anything about your conversions.
Firebase’s policy: firebase.google.com/support/privacy
On Android the app uses the INTERNET permission (for ads,
analytics and crash reporting), the notification permission if you allow
it, and, on Android 12 and older only, storage access for the file
tab. On iOS it asks only for notification permission and for tracking
permission through the App Tracking Transparency prompt; files are chosen
and saved through the system Files picker.
The app is a general-audience utility and does not knowingly collect personal information from children under 13.
Everything the app stores (the History list and your preferences) is on your device and is deleted by clearing History or uninstalling the app. For questions about data held by the services above, contact us and we will help.
Changes to this policy will be posted at this address with a new effective date.