BCD Decoder

The BCD Decoder interprets data that uses binary-coded decimal encoding, where each 4-bit nibble represents a decimal digit (0–9). It accepts one or more BCD-encoded bytes and produces a decimal value along with a digit-wise breakdown. Conceptually, each byte is split into its high and low nibbles; both nibbles must be in the 0–9 range. The digits are ordered according to endianness: big-endian treats the first byte as the most significant digits, while little-endian reverses the byte sequence. The final decimal value is formed by concatenating the digits and interpreting the result as a standard base-10 number. This tool is valuable for developers debugging data from microcontrollers, sensors, or serial streams that transmit numbers in BCD. Key differentiators: explicit nibble validation, optional endianness control, and a digit array output that aids verification without requiring external scripting. Use cases include validating EEPROM-stored numbers, decoding serial data logs, and teaching BCD concepts in digital logic courses. Core features include input validation for nibble values, optional per-nibble breakdown, and a decimal string representation for display. The tool supports multi-byte BCD sequences and returns a deterministic result for all valid inputs. This tool is designed for users who need precise, audit-ready BCD decoding with clear numeric outputs. It supports quick checks during hardware testing, firmware validation, and educational demonstrations of decimal reconstruction from BCD streams.