Browser Displays � Instead of '

Browser displays � instead of ´

You have to make sure the content is served with the proper character set:

Either send the content with a header that includes

<?php header("Content-Type: text/html; charset=[your charset]"); ?>

or - if the HTTP charset headers don't exist - insert a <META> element into the <head>:

<meta http-equiv="Content-Type" content="text/html; charset=[your charset]" />

Like the attribute name suggests, http-equiv is the equivalent of an HTTP response header and user agents should use them in case the corresponding HTTP headers are not set.

Like Hannes already suggested in the comments to the question, you can look at the headers returned by your webserver to see which encoding it serves. There is likely a discrepancy between the two servers. So change the [your charset] part above to that of the "working" server.

For a more elaborate explanation about the why, see Gumbo's answer.

Page shows code not rendering

~~It is likely that~~ TextEdit has formatted your text, since by saving it as a Web Document it thinks that you have typed up the web page how you want it displayed, with all formatting, instead of raw HTML code. Try to save the document as raw text, then change the extension manually from whatever it is (probably .txt) to .html. For a more permanent solution, it is advisable to use a non-formatting text editor when coding.

EDIT: This is what Apple have to say: http://support.apple.com/kb/ta20406

Website is displayed as HTML-Code instead of rendered HTML - indeterministic

If the browser writes the code and not renders it is because it's being told to do so, probably your app is returning html encoded in a way that browser thinks it's plain text.

Why is this HTML showing up as plain text in browser?

This HTML isn't being interpreted as plain text: it's being interpreted as HTML.

It's just that the contents of your HTML include markup that has been escaped, such as < and >.

Update

Is this the markup you want?

<!--square.html-->
<!DOCTYPE html>
<html>

<script id="vertex-shader" type="x-shader/x-vertex">
// GLSL vertex shader code
attribute vec4 vPosition;

void main()
{
gl_Position = vPosition;
}
</script>

<script id="fragment-shader" type="x-shader/x-fragment">
// GLSL fragment shader code
precision mediump float;

void main()
{
gl_FragColor = vec4( 1.0, 1.0, 1.0, 1.0 );
}
</script>

<!--Include A/S WebGL support libraries-->
<script type="text/javascript" src="../Common/webgl-utils.js"></script>
<script type="text/javascript" src="../Common/initShaders.js"></script>
<script type="text/javascript" src="../Common/MV.js"></script>
<script type="text/javascript" src="../Common/webgl-debug.js"></script>
<script type="text/javascript" src="square.js"></script>

<body>
<canvas id="gl-canvas" width="512" height=" 512">>
Oops ... your browser doesn't support the HTML5 canvas element
</canvas>
</body>
</html>

IE displays my code instead of my webpage, how can I fix this?

The issue here, I believe, is with your document being identified as UTF-8 encoded by the HTTP Response header, but arriving with a BOM that suggests it is UTF-16 encoded. Internet Explorer 10 and 11 give more weight to the header, than to the BOM. As a result, the UTF-16 document is read as UTF-8, which results in numerous null characters being added after nearly ever byte, causing your markup to be parsed as general text.

You can see the BOM (FF FE, "ÿþ"), and the null characters (00) in the following view:

Sample Image

Note the representation of your doctype. The null characters cause it to be broken up, so as not to be parsed as this:

<!DOCTYPE html>

But instead, like this (. represents null characters):

<.!.D.O.C.T.Y.P.E. .h.t.m.l.>

This pattern is repeated throughout the entire document, thus no part of it is interpreted as HTML, making all of it be rendered as basic text:

Sample Image

When saving your document, ensure that you are saving as UTF-8. I should note as well that Microsoft Edge, Internet Explorer's successor, does not behave the same way. Microsoft Edge gives the BOM (declaring UTF-16 encoding) precedence over the charset instructions in the header, thus rendering the page properly.

I came across numerous reports claiming that Notepad (which you reportedly used) always inserts a BOM. I would encourage you to avoid Notepad as an editor during web-development. Instead, use something like Visual Studio Code.

Browser displays entity name instead of symbol

It turned out that control did html encoding behind the scenes, and printed text was :

<test>

html code displayed as plain text in browsers

It's a problem with TextEdit. Open it with another editor and save it again. See if that fixes it.

You can also edit TextEdit so it will work with HTML. You can learn do that here.

Browser Displays � Instead of '