Sepia

Photos and screenshots say more than you think: where you were, what phone
you own, sometimes a hidden copy of the uncropped shot or a video clip
appended by motion-photo mode.

Sepia is the step before you hit send:

• X-ray: see everything the file says about you, ranked by severity. GPS in
plain words, the hidden thumbnail shown, trailing data called out.
• Redact: ink and pixelation burned into the pixels, plus crop. Where the device supports code
detection, QR codes are found and offered for covering.
• Prove it: the export is re-encoded from scratch, then Sepia re-opens its
own output and shows you what is (and is not) still inside.

Everything happens on your device. This app has no INTERNET permission: the
operating system will not let it open a connection, and you can check the
manifest instead of trusting a promise.

Runs on Android 9 and newer, with Android System WebView 108 or newer.
Android 9 has had no security fixes since January 2022, so on a phone that
old Sepia works, but the phone itself is easier to break into.

No accounts, no analytics, no dependencies. GPL licensed.