Base58 Encoder / Decoder
Encode or decode Base58 (Bitcoin alphabet) strings.
Mode
Base58 Output
About Base58 encoding
Base58 is a binary-to-text encoding popularized by Bitcoin. It uses 58 characters — the alphanumerics minus the easily-confused 0, O, I, and l — so values are safer to copy by hand. Unlike Base64 it has no padding and treats the input as one big number, preserving leading zero bytes as 1s. All encoding runs locally with native BigInt math.
Private & free — this tool runs entirely in your browser.
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