Base58 Encode

Encode data with the Bitcoin/IPFS Base58 alphabet, optionally with a Base58Check checksum.

Base58 and Base58Check

Base58 is Base62 minus the characters people confuse when reading: 0, O, I and l. It was designed for values that get copied by hand — Bitcoin addresses, IPFS content ids, Solana keys.

Base58Check adds a 4-byte checksum, the first four bytes of a double SHA-256 of the payload. A single mistyped character then fails the checksum instead of silently pointing at a different address.

Frequently asked questions

What does a checksum mismatch mean?

The value was mistyped, truncated or corrupted. With Base58Check, that is exactly the outcome you want — the alternative is a valid-looking address that belongs to nobody.

Why do leading zeros show up as 1s?

Base58 is a positional number conversion, and leading zero bytes carry no positional value. They are re-attached as leading 1 characters, which is why many Bitcoin addresses start with 1.

Related tools

Base58 DecodeDecode a Base58 or Base58Check string back to bytes, hex or text.Base64 EncodeEncode text or files to Base64, with standard or URL-safe alphabets and optional line wrapping.Base64 DecodeDecode Base64 back to text, choosing the character set (UTF-8, EUC-KR, Shift_JIS, GBK…) so the result reads correctly.File to Base64 / Base64 to FileTurn any file into a Base64 string or a data URI, and turn Base64 back into a downloadable file.Base32 EncodeEncode text to RFC 4648 Base32, with optional Base32hex alphabet and padding control.Base32 DecodeDecode RFC 4648 Base32 (or Base32hex) back to text or bytes, with a selectable output character set.