Base58 converter

Base58 is a binary-to-text encoding created for Bitcoin. Its alphabet is the 62 alphanumeric characters minus four that are easy to confuse: zero 0, uppercase O, uppercase I and lowercase l. It also avoids + and /, so encoded values can be double-clicked and selected as one word.

How to use it

1. Paste text or hex data to encode it, or paste a Base58 string to decode it.
2. Copy the output.

How Base58 works

Unlike Base64, Base58 does not work in fixed bit groups. The whole input is treated as one big number and repeatedly divided by 58; the remainders select characters from the alphabet 123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz. Each leading zero byte is written as a leading 1, which is why many Bitcoin addresses start with 1.

Example

The text hello (bytes 68 65 6c 6c 6f) encodes to Cn8eVZg. Decoding Cn8eVZg returns hello.

Where Base58 is used

• Bitcoin addresses and private keys use Base58Check, which appends a 4-byte checksum before encoding.
• IPFS CIDv0 identifiers (starting with Qm) are Base58-encoded multihashes.
• Solana and several other blockchains use Base58 for public keys and signatures.
• Short IDs that people may copy by hand.

This tool performs plain Base58. It does not validate Base58Check checksums, so a decoded address is shown as raw bytes.