Crypto Wallet Playground
BIP39 Seed Phrase Generator
BIP39-compliant mnemonic generation. Several phrase lengths, several languages.
About this tool
Generate BIP39 seed phrases for testing. Several phrase lengths, several languages. Free, in your browser.
BIP39 Seed Phrase Generator — FAQ
What is a BIP39 mnemonic?
A BIP39 mnemonic is a sequence of words that encodes the entropy used to generate a wallet's master key. It's the standard for wallet backups across all major cryptocurrency wallets.
How many words should I use?
12 words (128-bit security) is sufficient for most purposes. 24 words (256-bit security) provides extra security margin. We support 12, 15, 18, 21, and 24 words.
Are generated mnemonics secure?
Yes. They are generated using cryptographically secure randomness. However, they are intended for testing — never use generated mnemonics for real wallets.
More in Crypto Wallet Playground
HD Wallet Explorer
Explore HD wallet derivation trees interactively. Visualise BIP32 and BIP44 paths. Free, in your browser.
Crypto QR Code Generator
Create QR codes for cryptocurrency payment URIs. Supports bitcoin:, ethereum: and 13 more schemes.
Crypto Wallet Playground
A complete Web3 testing toolkit: generate wallets, validate addresses, create mnemonics, explore HD trees. Free, in your browser.
Test Wallet Generator
Generate wallet addresses for Sepolia, Holesky, Amoy, BNB Testnet and other public testnets. Free, in your browser.
Blockchain Address Generator
Generate wallet addresses for Bitcoin, Ethereum, Litecoin, Dogecoin, Solana and other networks. Free, in your browser.
Crypto Address Validator
Validate cryptocurrency addresses across 22+ blockchains: format, checksum and network compatibility.
Ready to Start?
Go to the generator and start creating realistic data right now
Generate Seed Phrase