Base64 encode/decode and cryptographic hashing (MD5/SHA) for text and files, fully offline.

Base64 / Hash Toolbox is a small, fast utility for developers. It encodes and decodes Base64 (standard or URL-safe alphabet) and computes MD5, SHA-1, SHA-256, and SHA-512 hashes of text or files. Large files are streamed and processed off the main thread so they are never fully loaded into memory, and a one-tap chip suggests the right Base64 direction automatically. Everything runs on-device — the App has no internet access, no ads, and requests no permissions.