v0.5.0
You can enter an existing BIP39 mnemonic, or generate a new random one. Typing your own twelve words will probably not work how you expect, since the words require a particular structure (the last word is a checksum).
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You can enter an existing BIP39 mnemonic, or generate a new random one. Typing your own twelve words will probably not work how you expect, since the words require a particular structure (the last word contains a checksum).
+For more info see the BIP39 spec.
@@ -128,8 +36,8 @@+ + Mnemonics with less than 12 words have low entropy and may be guessed by an attacker. + +
+ + Some characters have been discarded + +
++ + The mnemonic will appear more secure than it really is. + +
Valid entropy values include:
+Valid entropy values include:
+ +
++ The value of the "BIP85 Child Key" field shown below is not used + elsewhere on this page. It can be used as a new key. +
++ In case of the BIP39 application, you can paste it into the "BIP39 Mnemonic" + field to use it as a new mnemonic. +
++ Please read the + + BIP85 spec + + for more information. +
++
For more info see the BIP44 spec.
The account extended keys can be used for importing to most BIP44 compatible wallets, such as mycelium or electrum.
+The account extended keys can be used for importing to most BIP44 compatible wallets, such as mycelium or electrum.
The BIP32 derivation path and extended keys are the basis for the derived addresses.
+The BIP32 derivation path and extended keys are the basis for the derived addresses.
+
For more info see the BIP32 spec
+
Use path m/0'/0' with hardened addresses.
+
For more info see the Bitcoin Core BIP32 implementation
- Use path m/0'/0.
+ Use path m/0'/0.
+ For change addresses use path m/0'/1.
- For more info see + For more info see MultiBit HD
- Use path m/44'/0'/0'.
- Only enter the xpub extended key into block explorer search fields, never the xprv key.
+ Use path m/44'/0'/0'.
+ Only enter the xpub extended key into block explorer search fields, never the xprv key.
- Can be used with: + Can be used with: blockchain.info
Note these addreses are derived from the BIP32 Extended Key
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Note these addresses are derived from the BIP32 Extended Key
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Read more at the official BIP39 spec
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Read more at the official BIP32 spec
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See the demo at bip32.org
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Read more at the official BIP44 spec
-- - Use private keys at - brainwallet.org. - - Be careful - it can be easy to make mistakes if you don't know what you're doing. + Read more at the + official BIP49 spec +
++ Read more at the + official BIP85 spec +
++ Entropy values should not include the BIP39 checksum. This is automatically added by the tool.
-- + Entropy values must be sourced from a strong source of randomness. - This means flipping a fair coin, rolling a fair dice, noise measurements etc. - - Do NOT use phrases from books, lyrics from songs, your birthday or steet address, + This means flipping a fair coin, rolling a fair dice, noise measurements etc. + + Do NOT use phrases from books, lyrics from songs, your birthday or street address, keyboard mashing, or anything you think is random, because chances are overwhelming it isn't random enough for the needs of this tool.
- Do not store entropy. + Do not store entropy.
- Storing entropy (such as keeping a deck of cards in a specific shuffled order) is unreliable compared to storing a mnemonic. - Instead of storing entropy, store the mnemonic generated from the entropy. - Steganography may be beneficial when storing the mnemonic. + Storing entropy (such as keeping a deck of cards in a specific shuffled order) is unreliable compared to storing a mnemonic. + Instead of storing entropy, store the mnemonic generated from the entropy. + Steganography may be beneficial when storing the mnemonic.
- + The random mnemonic generator on this page uses a cryptographically secure random number generator. - The built in random generator can generally be trusted more than your own intuition about randomness. - If cryptographic randomness isn't available in your browser, this page will show a warning and the generate button will not work. - In that case you might choose to use your own source of entropy. + The built in random generator can generally be trusted more than your own intuition about randomness. + If cryptographic randomness isn't available in your browser, this page will show a warning and the generate button will not work. + In that case you might choose to use your own source of entropy. +
++ You are not a good source of entropy.
- You are not a good source of entropy. + Card entropy has been implemented assuming cards are replaced, not drawn one after another. + A full deck with replacement generates 232 bits of entropy (21 words). A full deck without replacement generates 225 bits of entropy (21 words). + Card entropy changed significantly from v0.4.3 to v0.5.0. The old version can be accessed at + + https://github.com/iancoleman/bip39/releases/tag/0.4.3 + + or + + https://web.archive.org/web/20201018232020/https://iancoleman.io/bip39/ + +
-- Please refer to the software license for more detail. + Please refer to the software license for more detail.
-The software is provided "as is", without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and noninfringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or the use or other dealings in the software.
+The software is provided "as is", without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and noninfringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or the use or other dealings in the software.
This tool is interoperable with any BIP39 wallet.
+Some similar tools to this one (ie not consumer wallets) are
+ ++
You can use this tool without having to be online.
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In your browser, select file save-as, and save this page as a file.
-+
Double-click that file to open it in a browser on any offline computer.
- Alternatively, download the file from the repository + Alternatively, download the file from the latest GitHub release - - https://github.com/iancoleman/bip39 + https://github.com/iancoleman/bip39/releases/latest/
- Get the source code from the repository + Get the source code from the repository - https://github.com/iancoleman/bip39
-BitcoinJS - @@ -652,11 +1071,11 @@