Regular & Reversible (Palindromic) Mnemonic Tool

Version 2.1 from:
https://github.com/hatgit

About these cybersecurity tools

There are two parts to this tool, the first titled "BIP39 Mnemonic Tool" generates regular BIP39-compliant recovery phrases, and the second tool labeled "BIP39 Palindromic Mnemonic Tool" creates reversible recovery phrases (mnemonics) that are BIP39-compliant in terms of checksum (even after the words are put into reverse order and will lead to a separate crypto vault).

This is a standalone application that doesn't require the internet to operate, as the all of the code is entirely in this page which can be saved as an .html file and used offline (be sure to first click to CLEAR button in the form below before saving for offline use).
When clicking "GENERATE" the entropy is generated by your device and using the getRandomValues command, as per the W3C (World Wide Web Consortium) Cryptography API. These tools also accept entropy that can be pasted manually for those [advanced users] who don't wish to rely on the above command. Note: each tool is independent of the other.

For more info see the official BIP39 specification.

REGULAR: BIP39 Mnemonic Tool (This will create a normal BIP-39 mnemonic)

STEP 1: Select word count:

OPTIONAL: Insert entropy in the form of a 0x-padded hex string of length 32 (for 12 words) or 64 (for 24 words):

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REVERSIBLE: BIP39 Palindromic Mnemonic Tool (This will create a reversible BIP-39 mnemonic)

STEP 1: Select word count:

OPTIONAL: Insert entropy in the form of a 0x-padded hex string of length 32 (for 12 words) or 64 (for 24 words):