HTML Entity Encoder Online - Encode HTML Characters

Encode special characters to HTML entities. Fast, secure, and completely free. All processing happens in your browser — no data is sent to any server.

What is an HTML Entity Encoder?

HTML entity encoding replaces characters that have special meaning in HTML — <, >, &, ", ' — with their named or numeric entity equivalents (&lt;, &gt;, &amp;, &quot;, &#39;), so the browser displays them as literal text instead of interpreting them as markup. Without this, a piece of text like "5 < 10 && x > 0" placed directly into an HTML page would be misread as the start of a tag, and text containing a raw & could be parsed as the beginning of an incomplete entity reference.

How to Use HTML Entity Encoder

1. Paste the raw text you want to safely display inside HTML
2. Click 'Encode' to convert special characters into their entity equivalents
3. Copy the encoded text and place it directly into your HTML markup
4. Use 'Decode' to convert entity-encoded text back to its original characters when reading HTML source
5. Preview both the encoded string and how it would visually render

Key Features

• Encodes the five core HTML-reserved characters plus extended entities
• Supports both named entities (&amp;) and numeric entities (&#38;)
• Two-way conversion between raw text and entity-encoded HTML
• Preserves whitespace and line breaks exactly
• Processes everything locally, without sending your text anywhere

Why Use HTML Entity Encoder?

Any time user-generated or dynamic text gets inserted directly into an HTML page — a comment, a search result snippet, a username — failing to entity-encode it first is one of the most common causes of broken layouts and a classic vector for cross-site scripting (XSS). Encoding a literal <script> tag typed by a user into &lt;script&gt; ensures it displays as visible text instead of executing. This tool lets you check exactly what a given string will encode to before you rely on your application's own encoding logic.

Common Use Cases

• Verifying how a piece of user-generated text will be safely rendered on a page
• Preparing code snippets (containing < and >) to display correctly inside a <pre> block
• Debugging why raw text with an ampersand or quote is breaking an HTML attribute
• Decoding entity-encoded text copied from a page's HTML source to read it plainly
• Encoding text for use inside an HTML attribute value that contains quotes

Frequently Asked Questions

Is entity encoding the same thing as escaping in JavaScript strings?

No — they solve different problems. HTML entity encoding protects text placed inside HTML markup from being interpreted as tags; JavaScript string escaping protects text inside a JS string literal. Using the wrong one in the wrong context is a common security bug.

Do I need to encode every character, or just the special ones?

Just the reserved characters (<, >, &, ", ') need encoding for safety; encoding every character is unnecessary and makes the text harder to read in the raw HTML source.

Does entity encoding fully prevent XSS by itself?

It's an important layer, but proper output encoding must match the context (HTML body vs. attribute vs. JavaScript vs. URL) — always combine it with your framework's built-in escaping and a sensible Content Security Policy.

What's the difference between &amp; and &#38;?

They represent the same character (&) — the first is a named entity, the second is the numeric character reference. Browsers treat them identically.

Can I decode text that mixes named and numeric entities?

Yes, the decoder recognizes both forms and converts each back to its original character regardless of which style was used.

Guides

• URL Encoding and Decoding: A Complete Developer Guide
• HTML Entity Encoding: Prevent XSS and Display Special Characters

Related Tools

• HTML Entity Decoder — Decode HTML entities to readable text
• URL Encoder — Encode URLs and special characters
• Base64 Encoder — Encode text to Base64 format