Use this decoder when the input is known to use the named encoding or classical cipher and you need to recover its bytes, symbols, numbers, or text deterministically.

Text

Escaped HTML text.

Decode HTML syntax entities and decimal or hexadecimal numeric character references. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Text

Decoded plain text.

• Decoding cannot reliably identify an unknown format or repair arbitrary corruption. Alphabet variants, padding, whitespace, character encodings, byte order, framing, cipher keys, and malformed-input policies must match the producer.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Confirm the format from metadata or a specification, preserve the original input, and validate decoded length or checksums where available. Treat decoded untrusted content as data rather than executable markup or code.

• Unsigned Varint Decoder

  Decode one unsigned LEB128 varint from a hexadecimal byte string, returning the exact integer as decimal text. Rejects trailing bytes and encodings beyond 64 bits.

• Grade 1 Braille Decoder

  Decode uncontracted English Unicode Braille letters, digits, and common punctuation. Numeric and capital indicators are interpreted; contracted Braille is not supported.

• Delta Decoder

  Reconstruct a numeric sequence from a first value and successive differences; floating-point rounding may appear in non-integer inputs.