🅱️ Base58 Encoder / Decoder
Base58 uses 58 characters with the look-alikes (0, O, I, l) removed — the encoding behind Bitcoin addresses and IPFS hashes. Encode or decode instantly.
12 chars → 17 Base58 chars (Bitcoin alphabet)
How the base58 encoder / decoder works
Base58 encodes data using 58 characters — the digits and letters with the four easily-confused ones removed: no 0 (zero), O (capital o), I (capital i) or l (lowercase L). The tool treats the input's bytes as one big number and re-expresses it in base 58 (the same big-integer scheme as Base62), preserving leading zero bytes as leading "1" characters so the value round-trips exactly. This is the encoding behind Bitcoin addresses, IPFS content hashes and many other identifiers, chosen because the result is compact and can be read aloud or copied by hand with little risk of error.
This is plain Base58 (encoding, not encryption) with the Bitcoin/IPFS alphabet — it is fully reversible and keeps no secret. Note it is not Base58Check: it does not add or verify the 4-byte checksum and version byte that a full Bitcoin address uses, so use it for raw Base58 data, not for validating an address. Everything runs in your browser and works offline.
Frequently asked questions
What is Base58?
A binary-to-text encoding that uses 58 characters — the alphanumerics minus 0, O, I and l, which are easy to mistake for one another. It is the encoding used for Bitcoin addresses, IPFS hashes and similar identifiers, where a human might read or type the value.
Why does Base58 leave out 0, O, I and l?
To prevent transcription mistakes. Zero and capital O look alike, as do capital I and lowercase l, so removing them makes a Base58 string far safer to copy by hand, read aloud or print than Base64 or hex.
Is this Base58 or Base58Check?
This is plain Base58. Base58Check (used for full Bitcoin addresses) wraps the data with a version byte and a 4-byte double-SHA-256 checksum before encoding. This tool encodes and decodes the raw Base58 alphabet without that checksum layer.
How is Base58 different from Base64?
Base64 uses 64 characters including +, / and = and is more compact, but those symbols are awkward in URLs and error-prone to type. Base58 drops the confusable and punctuation characters for safer human handling, at the cost of slightly longer output.
Is my text uploaded?
No — encoding and decoding run entirely in your browser and nothing is transmitted. It works offline.