Base58 Encoder Decoder

The Base58 Encoder Decoder converts text to and from Base58, the compact binary-to-text encoding made popular by Bitcoin addresses, IPFS content identifiers and many other distributed systems.

Base58 is a deliberate variant of Base64 that drops the four visually confusing characters — zero, capital O, capital I and lowercase l — along with the punctuation that breaks when a value is double-clicked or read aloud.

The result is a string that is safe to copy by hand, embed in a URL or print on paper without ambiguity.

Switch between encode and decode, paste your data, and the conversion happens live.

Encoding runs your text through UTF-8 first, so emoji and accented characters survive the round trip, and leading zero bytes are preserved as leading ones exactly as the Bitcoin specification requires.

Decoding validates every character against the Base58 alphabet and reports a clear error if it finds one of the excluded letters, and it checks that the recovered bytes form valid UTF-8 text before showing them.

This makes it handy for inspecting an address, debugging a CID or learning how the encoding behaves.

All processing happens locally in your browser using built-in big-integer maths; nothing you paste is uploaded, logged or stored, and the tool keeps working offline once loaded.