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Base58 and Base58Check

Bitcoin-alphabet Base58 with an optional Base58Check checksum.
EncodeDecodeTextHexClearInputBase58Check (double-SHA256 checksum)Appends 4 checksum bytes on encode and re-verifies them on decode, Bitcoin's address format.

Exact BigInt math over the Bitcoin alphabet. Ambiguous characters are refused, never guessed.
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Paste, drop, or type to begin. Everything stays on this device.

Next door in Encoding

- Base32 Encoder (/encoding/base32)
- Base62 Encoder (/encoding/base62)
All encoding tools (/encoding)

Canonical HTML: https://nutter.tools/encoding/base58
Markdown version: https://nutter.tools/encoding/base58/index.md
Plain-text version: https://nutter.tools/encoding/base58/index.txt
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