Crypto Tools
BIP39 Seed Phrase Validator — Check Wallet Recovery Words Offline
Check whether individual words in a seed phrase appear in the official BIP39 English wordlist — useful when recovering a wallet and suspecting a typo. Shows word-by-word results for 12- or 24-word phrases. Runs in your browser: no words are ever transmitted. Never enter a real seed phrase on any website.
- Enter a 12- or 24-word seed phrase with words separated by spaces.
- Each word is checked against the official BIP39 English wordlist.
- See word-by-word results — valid words in green, invalid in red.
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Security Warning
Never enter your real seed phrase on any website. This tool is for educational and recovery practice only. If you use a real seed phrase here, consider it compromised and move your funds.
Paste your 12 or 24-word seed phrase above to validate it. All validation happens locally in your browser.
About BIP39
BIP39 is a standard for encoding entropy as a mnemonic phrase of 12 or 24 words. This tool validates:
- Word count (must be 12 or 24)
- Each word is in the official BIP39 English wordlist
- Checksum validation using SHA256
- Fuzzy matching suggestions for misspelled words
Frequently Asked Questions
- What is BIP39?
- BIP39 is a Bitcoin Improvement Proposal that defines a standard for generating mnemonic seed phrases from a wordlist of 2048 English words. Most hardware and software wallets use BIP39 seed phrases.
- Why only 12 or 24 words?
- 12 words encode 128 bits of entropy plus 4 checksum bits. 24 words encode 256 bits plus 8 checksum bits. Both are standard BIP39 lengths.
- Can I use this tool to recover my wallet?
- This tool only checks whether individual words appear in the BIP39 wordlist. Full wallet recovery also requires checksum validation and is typically done directly in your wallet software.
- Is it safe to enter words here?
- Never enter your real seed phrase on any website, including this one. Use this tool only with test or dummy phrases.