Convert HTML characters to named or numeric entities and decode HTML entities safely.
HTML Entity Encoder & Decoder is an online engineering and computational utility designed to provide immediate, high-precision results for students, researchers, and developers.
Calculations use standard precision formulas and client-side processing:
Widely utilized in academic coursework, laboratory experimentation, production engineering, electronic circuit prototyping, and web application development.
Format, beautify, inspect tree structures, and compact JSON strings with instant syntax highlighting.
Validate JSON structure and syntax with line-by-line error positioning and detailed diagnostics.
Encode plain text into Base64 format and decode Base64 strings back to readable plain text.
Encode special characters for URL parameters (percent-encoding) and decode encoded URLs.
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