RFC 1642 · EXPERIMENTAL · 1994

UTF-7 - A Mail-Safe Transformation Format of Unicode

Overview

RFC 1642, “UTF-7 - A Mail-Safe Transformation Format of Unicode”, is an Experimental document published in July 1994 by D. Goldsmith, M. Davis. It has been obsoleted by RFC 2152 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.

Abstract

This document describes a new transformation format of Unicode that contains only 7-bit ASCII characters and is intended to be readable by humans in the limiting case that the document consists of characters from the US-ASCII repertoire. This memo defines an Experimental Protocol for the Internet community.

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

What “Experimental” means

Describes a specification that is part of a research or development effort, published so the community can gain experience with it.

Read this RFC

The canonical text of RFC 1642 is hosted at rfc-editor.org. Available in TXT,PS,PDF,HTML.

Relationships to other RFCs
Obsoleted by
RFC 2152
Other RFCs from 1994

Who Is Online

In total there are 76 users online: 0 registered, 70 guests and 6 bots.

Most users ever online was 1,226 on 13 Jun 2026, 3:56 am.

Bots: AhrefsBot Applebot Googlebot Other Bot SemrushBot Sogou

Users active in the past 15 minutes. Total registered members: 354