Reads an Electrum wallet file and reports which of Electrum's encryption schemes is in the way, whether an encrypted file is complete or truncated, the storage version and which Electrum releases can open it, the wallet type (standard, imported, multisig, 2FA), the seed type and derivation path, and the public addresses. 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.
An Electrum wallet file can hold spendable keys. Here is exactly what this tool does and does not do. It reads the file locally, in your browser, to work out which Electrum format it is and report its structure. It never transmits the file anywhere, never stores it, and never shows, exports, copies, or logs a seed phrase, a master private key, or any private key, not when the wallet file is storing them in the clear, not behind a toggle. It reports format, encryption state, wallet type, seed type, derivation path, structural integrity, 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.
An Electrum wallet made without a password keeps its seed phrase in readable text inside the file. This tool will tell you that is the case, and will not print a single word of it. That restraint is the point: getting spendable keys out of a wallet 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.
default_wallet, with no file extension, inside Electrum's wallets folder. 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.