Your files stay on your device

# 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.
Nothing in yet

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
Agent index: https://nutter.tools/llms.txt