HTML Entity Encoder
Encode text to named and numeric HTML entities and decode them back.
- Runs locally in your browser
- No upload required
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Supported formats
Privacy
Runs entirely in your browser. Your input is never uploaded, stored, or sent to a third party.
HTML entities encoded.
How it works
- Replaced the five markup-significant characters with named entities.
- Wrote non-ASCII characters as decimal numeric entities.
- Encoding is safe for HTML text context but is not a complete XSS filter; validate untrusted HTML separately.
Methodology
- Read the input text one character at a time.
- Apply the cipher or encoding transformation for the chosen direction.
- Return the transformed text with a short summary.
Usage
- Paste or type the text to convert.
- Choose Encode or Decode.
- Read the converted text and copy it.
Examples
These are examples, not current values: they use fixed inputs, while the interactive tool computes live results in your browser.
Encode a sample
{
"text": "<b> & \"quotes\"",
"direction": "encode"
}Decode a sample
{
"text": "<b>",
"direction": "decode"
}Limitations
How the HTML Entity Encoder works
Encode text to named and numeric HTML entities and decode them back. The transformation is a single deterministic pass, so the same input always produces the same output.
Frequently asked questions
- Is this cipher secure?
- No. Classical substitution and transposition ciphers are educational and are not suitable for protecting real secrets.
- Does everything round-trip?
- Reversible ciphers round-trip for alphabetic input; encodings that normalise case or drop characters document that in their notes.
Sources
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