Identifies MultiBit Classic and MultiBit HD files (.wallet, .key, .info, mbhd.wallet.aes, wallet.aes.zip), reports whether each is encrypted and whether it is complete or truncated, and says what the next step is. This file runs entirely on your machine; the whole point of downloading it is to disconnect from the internet before you use it on a real wallet file.
MultiBit files hold live money. Here is exactly what this tool does and does not do. It reads the file locally, in your browser, to identify which MultiBit format it is and report its structure. It never transmits the file anywhere, never stores it, and never shows, exports, copies, or logs a private key, not for an unencrypted .wallet, not for a plain-text .key export, not behind a toggle. It reports format, encryption status, key counts, key dates, and public addresses only. There is no password field: it never attempts decryption or password guessing. It never writes to, renames, or modifies your file.
A MultiBit Classic .key export is plain-text spendable keys. This tool will tell you how many are in it and when they were made, and will not print a single one of them. That restraint is the point: extracting spendable keys is bench work with real consequences if it goes wrong, and not something a web page should hand out.
Given that this is live money, the safest way to run this is exactly how you're using it now: offline, disconnected from the internet. It's the recommended path for this tool, not just an option.
.wallet, .key, .info, mbhd.wallet.aes, mbhd.checkpoints, a wallet.aes.zip backup. Nothing leaves this browser tab.Nothing here is uploaded. Verify it yourself: open your browser's network tab before dropping a file, and confirm nothing fires.