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HTML Entities Encoder & Decoder - Clean Character Sanitization Tool
Encode and decode special characters, symbols, and code into secure HTML entities to prevent XSS injection and browser parsing errors.
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Continue to Free Tool / Download →Encoding and Decoding Special HTML Entities
Web browsers interpret reserved characters such as angle brackets and ampersands as syntax commands. Converting these symbols into corresponding character entities prevents injection attacks and formatting breakages.
Essential Reserved Characters Table
| Character | Entity Name | Entity Number | Description |
|---|---|---|---|
| < | < | < | Less than |
| > | > | > | Greater than |
| & | & | & | Ampersand |
| " | " | " | Double quotation mark |
| ' | ' | ' | Single quotation mark (apostrophe) |
Implementation in Modern JavaScript
const encodeHTML = str => str.replace(/[&<>"']/g,
tag => ({ '&': '&', '<': '<', '>': '>', '"': '"', "'": ''' }[tag] || tag));
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