What does HTML Entity Encode / Decode do?

Encode and decode HTML entities such as & and ©. It belongs to the Encode & Crypto group and runs entirely in your browser — nothing you type or paste is uploaded.

What encryption algorithms are supported?

MD5, SHA-1, SHA-256, SHA-512, Base64 and other common encoding and hashing algorithms.

Can encrypted results be decrypted?

Hash algorithms (MD5, SHA) are one-way and cannot be decrypted. Base64 can be decoded.

HTML Entity Encode / Decode

Encode and decode HTML entities such as & and ©.

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About HTML Entity Encode / Decode

HTML entity encoding turns special characters into safe entity references. Encode: turns < > & " into entities Decode: turn entities back into characters Covers 37 common HTML entities

Common HTML entities

These 41 named entities are exactly what the encoder knows; every other character passes through untouched, and anything finer you write yourself as a numeric reference (é or é). Decoding is broader — it goes through the browser HTML parser, so all of HTML5’s two thousand-odd named entities resolve.

The five characters you must escape

&&: The ampersand itself (U+0026). Left bare, it starts an entity reference.
<<: Less-than (U+003C). A browser reads a bare one as the start of a tag.
>>: Greater-than (U+003E), the closing half of every tag.
"": Straight double quote (U+0022) — needed inside a value delimited by double quotes.
'': Apostrophe (U+0027), written numerically because HTML4 had no '.

Currency, marks and fractions

©©: Copyright sign (U+00A9).
®®: Registered trademark sign (U+00AE).
€€: Euro sign (U+20AC).
££: Pound sign (U+00A3).
¥¥: Yen sign (U+00A5), also the usual symbol for the yuan.
¢¢: Cent sign (U+00A2).
½½: One half (U+00BD).
¼¼: One quarter (U+00BC).
¾¾: Three quarters (U+00BE).

Punctuation and typography

§§: Section sign (U+00A7), used for legal clauses.
¶¶: Pilcrow or paragraph mark (U+00B6).
••: Bullet (U+2022).
……: Horizontal ellipsis (U+2026) — one character, not three periods.

Math and measurement

°°: Degree sign (U+00B0).
±±: Plus-minus sign (U+00B1).
××: Multiplication sign (U+00D7) — not the letter x.
÷÷: Division sign (U+00F7).
√√: Square root (U+221A).
∞∞: Infinity (U+221E).
≈≈: Almost equal to (U+2248).
≠≠: Not equal to (U+2260).
≤≤: Less-than or equal to (U+2264).
≥≥: Greater-than or equal to (U+2265).

Arrows

←←: Leftwards arrow (U+2190).
→→: Rightwards arrow (U+2192), the usual one for flows.
↑↑: Upwards arrow (U+2191).
↓↓: Downwards arrow (U+2193).
↔↔: Left-right arrow (U+2194).

Greek letters

αα: Greek small letter alpha (U+03B1).
ββ: Greek small letter beta (U+03B2).
γγ: Greek small letter gamma (U+03B3).
δδ: Greek small letter delta (U+03B4).
εε: Greek small letter epsilon (U+03B5).
ππ: Greek small letter pi (U+03C0).
ωω: Greek small letter omega (U+03C9).
ΣΣ: Greek capital letter sigma (U+03A3), also the summation sign.

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Support for conversion between multiple data formats
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Support for multiple encryption algorithms

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