Using the Tool: Step-by-Step Input & Result Interpretation
Getting reliable results from the BIP39 Mnemonic Verifier is straightforward. This guide walks you through the process from pasting a phrase to understanding every possible outcome.
Start by opening the main page. You will see a large textarea near the top. Click inside it and paste your twelve-word or twenty-four-word mnemonic phrase. The tool works best when you paste directly from your wallet software or a secure note rather than typing manually. After pasting, make sure there are no extra lines or characters at the beginning or end.
Optionally, enter a passphrase in the field below if your wallet used one during seed generation. Leave this blank if no passphrase was set. You can also enter a number in the Known Words field if you want to simulate partial knowledge for security analysis, but this is not required for basic checking.
Click the Analyze All button. The tool processes the input in your browser within a second or two. A spinner appears briefly while the validation runs. Once complete, switch between the three tabs to view results.
Interpreting the Basic Validation Tab
The Basic Validation tab shows the most immediate feedback. A green box with the message All words are valid BIP39 words means every word in your phrase matches an entry in the official 2048-word list and the count is correct. A red box indicates a problem. The most common messages are Must be exactly 12 or 24 words or Found X invalid word(s) followed by a list of the words that do not belong in the BIP39 wordlist.
If invalid words are listed, compare them carefully against your original source. A single typo or autocorrect mistake is often the cause. Correct the phrase and click Analyze All again.
Advanced Tabs Overview
The Entropy & Keys tab only populates if the basic validation passes. It displays the extracted entropy in hexadecimal form, the derived seed, master private key, chain code, and child keys for six common derivation paths. These values are educational and should never be used with real funds.
The Security Strength tab shows the theoretical brute-force resistance of the phrase. For twelve words you see Strong; for twenty-four words you see Excellent. Adjusting the Known Words slider updates the remaining entropy and estimated attack times.
After reviewing results, use the Clear button to reset everything before entering a different phrase. Always remember that this tool is for verification only and does not replace a full wallet recovery process.