Wallets & keys

BIP39 Seed Phrase Validator

Understand mnemonic word-list and checksum validation.

Runs locally

Security & privacy. Sensitive inputs and calculations stay on your device. No secrets are sent to the backend or saved in browser storage. Clear the form and result when finished. These key tools have not received an independent security audit; do not use it with real funds.

Use this tool

Runs on your device. No wallet secrets are sent to the server. These key tools have not received an independent audit; do not use with real funds.

English BIP39 only. A valid checksum does not establish safety or ownership.

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What this tool is for

A valid BIP39 checksum can catch some transcription mistakes. It cannot prove that a phrase is safe, privately generated, backed up correctly, or associated with a funded wallet.

Supported behavior

English BIP39 only. A valid checksum does not establish safety or ownership.

Security & privacy

Sensitive inputs and calculations stay on your device. No secrets are sent to the backend or saved in browser storage. Clear the form and result when finished. These key tools have not received an independent security audit; do not use it with real funds.