Parse HTML: Escape, Encode and Decode

"Parsing" HTML for Blogger means escaping it: < becomes &lt;, > becomes &gt;, & becomes &amp; and quotes become &quot; and &#39;. The browser then shows the code as text instead of running it, which is what you need to display HTML, CSS or JavaScript examples in a post. For example <a href="/menu?item=kopi&size=L">Kopi & teh ☕</a> becomes &lt;a href=&quot;/menu?item=kopi&amp;size=L&quot;&gt;Kopi &amp; teh ☕&lt;/a&gt;.

Paste the code, keep HTML entities and Encode selected, tick Wrap in a code block, and copy the result. In the Blogger post editor, switch to HTML view and paste it where the code should appear. The <pre> keeps spaces and line breaks; the <code> marks it as code for screen readers and search engines.

Not if you add it the recommended way: in Layout, Add a Gadget, HTML/JavaScript, paste the AdSense code unchanged. Only code pasted into the theme XML (Theme, Edit HTML) must be valid XML, where a bare & inside a script breaks saving; write it as &amp; there. Never escape the < and > of a script you want to run, or it will show as text.

encodeURIComponent encodes everything that has a meaning in a URL, including / ? & = and #, so use it for one value such as a search term or a parameter. encodeURI leaves those characters alone, so use it for a whole address that only needs spaces and non-ASCII letters fixed. Tick Whole URL to use encodeURI.

No. Base64 only rewrites bytes with 64 safe characters (A–Z, a–z, 0–9, + and /) so binary data can travel in text such as email, JSON or data URLs. Anyone can decode it instantly, so never use it to hide passwords or links. It also makes data about 33% larger.

Choose JavaScript / JSON string and Encode. Quotes become \", backslashes \\, line breaks \n and tabs \t, and </script> becomes <\/script> so it cannot end a script block early. Paste the result between double quotes. Decode does the reverse and also understands \x41, \u0041 and \u{1F600}.

No. Every conversion runs in your browser with JavaScript, so tokens, keys and private code never leave your device. Only your last input is kept in this browser's storage.