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301 Moved Permanently - utf8.com
HTTP Status: 301
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])
Date: Mon, 12 May 2025 18:19:47 GMT
Content-Type: text/html
Content-Length: 167
Connection: keep-alive
Cache-Control: max-age=3600
Expires: Mon, 12 May 2025 19:19:47 GMT
Location: https://utf8.com/
Set-Cookie: __cf_bm=LAM8_aioag4XOSwUaHZmOcNOxMKBGjTfSFJWP1qW21A-1747073987-1.0.1.1-Uhne4m2NrfLDDkCPEB5wGJMy_1T4q1M.azwJ9atLIZEGjrzttyha1QRwKzDkp9vfJBN05MD7UnQgNcuLe2hcIYwAL2YOD5nG7z_ksiUNNvQ; path=/; expires=Mon, 12-May-25 18:49:47 GMT; domain=.utf8.com; HttpOnly
Server: cloudflare
CF-RAY: 93ebed246fb18dc2-HEL
alt-svc: h3=":443"; ma=86400

HTTP Code 301 Moved Permanently

http status code 301 means that the requested resource has been permanently moved to a new URL. All future requests should use the new address.

When is Code 301 used?

  • When changing a website domain
  • When modifying URL structures
  • When setting up redirects for SEO

What does Code 301 mean for the user?

The browser will automatically redirect the user to the new address, and search engines will update their indexes.

200 OK - https://utf8.com/
HTTP Status: 200
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])
Date: Mon, 12 May 2025 18:19:47 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
last-modified: Fri, 14 Jun 2024 18:48:21 GMT
x-rgw-object-type: Normal
x-amz-request-id: tx00000a53fa2d654bb4a8c-0068211035-2bc02a44-nyc3d
Cache-Control: public,max-age=10,s-maxage=86400
x-do-app-origin: b60121e6-e69e-11ec-b1dc-0c42a19a82a7
x-do-orig-status: 200
CF-Cache-Status: HIT
Accept-Ranges: bytes
Set-Cookie: __cf_bm=6TrVzyjtT5MGXSJ6BQj8AqnxOu.G_HFilZkNhL_V_0M-1747073987-1.0.1.1-7RhmXruWz.C6O7Pq2hRmqidIiDRvR31mHDQy3LqP_sUH1YHlSVjSES2PYNl2LHxH4gcsN1t_hg_aRVQAVs8X8sVpIpf9f784I1DEU2FqjUA; path=/; expires=Mon, 12-May-25 18:49:47 GMT; domain=.utf8.com; HttpOnly; Secure; SameSite=None
Server: cloudflare
CF-RAY: 93ebed24ef5a8d63-HEL
alt-svc: h3=":443"; ma=86400

HTTP Code 200 OK

http status code 200 is a standard successful HTTP server response. It means that the client’s request (e.g., from a browser) was successfully processed, and the server is delivering the requested data.

When is Code 200 used?

  • When loading a web page
  • When successfully receiving an API response
  • When processing a form or another HTTP request

What does Code 200 mean for the user?

The user receives content without errors, and the page or application functions properly. If Code 200 is accompanied by data, the browser or program processes and displays it to the user.

GET / HTTP/1.1
Host: utf8.com
Accept: */*
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])

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<header>
<h1>UTF-8 and Unicode</h1>

<p><strong>U</strong>nicode <strong>T</strong>ransformation
<strong>F</strong>ormat <strong>8</strong>-bit is a variable-width
encoding that can represent every character in the <a
href="https://home.unicode.org/">Unicode</a>
character set. It was designed for backward compatibility with ASCII and
to avoid the complications of endianness and byte order marks in UTF-16
and UTF-32.
<sup><a href="https://en.wikipedia.org/wiki/UTF-8">[1]</a></sup>
</p>

</header>
<main>

<aside>
<a class="amzn" id="unicode5-1"
title="Unicode Explained: Internationalize Documents, Programs, and Web Sites"
rel="sponsored" target="_blank"
href="https://www.amazon.com/o/ASIN/059610121X/utf8com-20"><amp-img
alt="Unicode Explained: Internationalize Documents, Programs, and Web Sites" class="mt-2"
src="unicode-explained.jpg" width="137" height="180"></amp-img></a>
<p class="small"><a target="_blank" rel="sponsored" href="https://www.amazon.com/o/ASIN/059610121X/utf8com-20">Unicode Explained: Internationalize Documents, Programs, and Web Sites</a>
 &middot; <em class="small text-muted text-nowrap">paid link</em></p>
</aside>

<p>UTF-8 encodes each Unicode character as a variable number of 1 to 4
octets, where the number of octets depends on the integer value assigned
to the Unicode character.  It is an efficient encoding of Unicode
documents that use mostly US-ASCII characters because it represents each
character in the range U+0000 through U+007F as a single octet.</p>
<p>UTF-8 is the default encoding for <a
href="https://www.w3.org/TR/REC-xml/">XML</a> and since 2010 has become
the dominant character set on the Web.</p>

<h2>Standards</h2>
<ul>
<li><a href="https://www.ietf.org/rfc/rfc3629.txt">RFC
    3629</a>: UTF-8, a transformation format of ISO 10646.  November 2003.
<li><a href="https://www.unicode.org/standard/standard.html">The
    Unicode Standard 5.0</a>, November 2006. [<a class="amzn"
id="unicode5-2" title="The Unicode Standard, Version 5.0"
rel="sponsored" target="_blank"
href="https://www.amazon.com/o/ASIN/0321480910/ref=nosim/utf8com-20">purchase
from Amazon.com</a>]
<ul><li>In particular, see the <a title="2.5 Encoding Forms: UTF-8"
    href="https://www.unicode.org/versions/Unicode4.0.0/ch02.pdf#G11165">informal
    description</a> of UTF-8 in sections 2.5 and 2.6, pages 30-32, and a
    much more <a title="3.9 Unicode Encoding Forms: UTF-8"
    href="https://www.unicode.org/versions/Unicode4.0.0/ch03.pdf#G31703">formal
    definition</a> in sections 3.9 and 3.10, pages 77-81.
  </ul>
</ul>

<h2>Articles and background reading</h2>

<ul>
<li><a href="https://www.cl.cam.ac.uk/~mgk25/unicode.html">UTF-8 and
    Unicode FAQ for Unix/Linux</a> by Markus Kuhn
<li><a
    href="https://www.icu-project.org/docs/papers/forms_of_unicode/">Forms
    of Unicode</a>, an excellent overview by Mark Davis
<li><a href="https://en.wikipedia.org/wiki/UTF-8">Wikipedia UTF-8</a>
    contains a good discussion of why five- and six-octet sequences are
    now illegal UTF-8
<li><a
href="https://www.czyborra.com/utf/">Unicode
Transformation Formats</a> [czyborra.com]
<li><a
    href="https://www.joelonsoftware.com/articles/Unicode.html">The
    Absolute Minimum Every Software Developer Absolutely, Positively
    Must Know About Unicode and Character Sets (No Excuses!)</a>, an
    amusing and informative article by Joel Spolsky
</ul>

<h2>Character Sets</h2>

<p>The MIME character set attribute for UTF-8 is <code>UTF-8</code>.
Character sets are case-insensitive, so <code>utf-8</code> is equally
valid. [<a
href="https://www.iana.org/assignments/character-sets">IANA Character
Sets</a>].</p>

<p>In a modern HTML 5 page, place this tag inside <code>&lt;head&gt;</code> ...
<code>&lt;/head&gt;</code>:</p>

<pre>
&lt;meta charset="UTF-8"&gt;
</pre>

<p>In an XML prolog, the encoding is typically specified as an
attribute:</p>

<pre>
&lt;?xml version="1.0" encoding="UTF-8" ?&gt;
</pre>

</main>

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