0x56erify is a minimal, offline-first checksum verification tool for Android. Pick a file with the system document picker, compute its SHA-256 or SHA-512 checksum, and compare it against a hash you paste in (for example, one published alongside a download) to confirm the file wasn't corrupted or tampered with. Features: * Pick any file using Android's built-in Storage Access Framework picker * Compute SHA-256 or SHA-512 checksums * Streamed hashing: large files are never fully loaded into memory * Copy or share the computed hash * Paste an expected hash and get a clear MATCH / MISMATCH result * Case-insensitive, whitespace-tolerant hash comparison Privacy and permissions: * All processing happens entirely on-device * No network access, no INTERNET permission, no analytics, no ads, no accounts * No broad storage permissions - files are accessed only through the system picker for the duration of the operation * No proprietary or Google Play Services / Firebase dependencies 0x56erify is free and open source software, released under the Apache License 2.0.