The Multibase Data Format

The information below is for an old version of the document
Document Type Expired Internet-Draft (individual)
Authors Juan Benet  , Manu Sporny 
Last updated 2019-07-04 (latest revision 2018-12-31)
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Expired & archived
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IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Raw binary data is often encoded using a mechanism that enables the data to be included in human-readable text-based formats. This mechanism is often referred to as "base-encoding the data". Base- encoding is often used when expressing binary data in hyperlinks, cryptographic keys in web pages, or security tokens in application software. There are a variety of base-encodings, such as base32, base58, and base64. It is not always possible to differentiate one base-encoding from another. The purpose of this specification is to provide a mechanism to be able to deterministically identify the base-encoding for a particular string of data.


Juan Benet (
Manu Sporny (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)