Developer Tools
URL Encoder
Encode special characters in URLs for safe transmission and query parameters.
HTML Encoder / Decoder
Encode and decode HTML entities client-side instantly. Convert special characters (like <, >, &, ", ') into safe HTML entity equivalents (named, decimal, or hexadecimal) to prevent rendering issues and XSS vulnerabilities, or decode encoded HTML blocks back to raw text.
Operation Settings
Security check: All processing happens locally in your browser. No data is sent to our servers.
What is the HTML Encoder / Decoder?
The FreeTechLearner HTML Encoder / Decoder converts raw text into escaped HTML entities and decodes entities back to plain text. It supports Named, Decimal, and Hexadecimal formats, has configurable character scopes (Markup-only or Non-ASCII), and runs completely in the browser.
How to Use
- Select the operation mode: HTML Encode or HTML Decode.
- Paste your text or HTML string into the input panel.
- Configure options: Choose encoding scope (Special Characters or All Non-ASCII) and output format (Named, Decimal, Hex).
- The encoded or decoded text updates instantly in the output panel.
- Copy the results to your clipboard or download them as a .txt file.
Common Use Cases
- Escaping raw HTML/XML code blocks to display them on websites
- Decoding escaped HTML payloads from logs or database exports
- Securing user inputs against XSS before database storage or display
- Converting special symbols and emojis to safe entity formats
Key Benefits
- 100% client-side execution for strict data privacy
- Real-time processing with character counters
- Supports Named, Decimal, and Hexadecimal entity formats
- Safe DOM-less decoder to prevent execution of malicious code during decoding
- Instant copy-to-clipboard and file downloads
Frequently Asked Questions
What is HTML encoding?
HTML encoding (or escaping) is the process of converting reserved characters in HTML (such as <, >, &, ", and ') into their corresponding HTML entity representations. This prevents the browser from interpreting them as HTML tags, which is critical for security and displaying raw code.
What are named, decimal, and hexadecimal entities?
Named entities use friendly abbreviations (e.g. < for <). Decimal entities use the Unicode code point in base 10 (e.g. <). Hexadecimal entities use the Unicode code point in base 16 (e.g. <). All three are valid in HTML.
Does this tool prevent Cross-Site Scripting (XSS)?
Yes, HTML encoding untrusted user input before rendering it in the DOM is one of the primary defense mechanisms against XSS attacks, as it prevents scripts inside <script> or event handlers from executing.
Is my text sent to a server?
No. All encoding and decoding operations happen entirely client-side in your web browser using JavaScript. No data ever leaves your device.
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