RFC 3548 · INFORMATIONAL · 2003

The Base16, Base32, and Base64 Data Encodings

Overview

RFC 3548, “The Base16, Base32, and Base64 Data Encodings”, is an Informational document published in July 2003 by S. Josefsson. It has been obsoleted by RFC 4648 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.

Abstract

This document describes the commonly used base 64, base 32, and base 16 encoding schemes. It also discusses the use of line-feeds in encoded data, use of padding in encoded data, use of non-alphabet characters in encoded data, and use of different encoding alphabets. This memo provides information for the Internet community.

Abstract as published in the RFC, via rfc-editor.org.

What “Informational” means

Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.

Read this RFC

The canonical text of RFC 3548 is hosted at rfc-editor.org. Available in TXT,HTML.

Relationships to other RFCs
Obsoleted by
RFC 4648
Other RFCs from 2003

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