Hex Encoder/Decoder - Text to Hexadecimal Converter Online

Convert text to hex and hex to text. Essential for embedded programming, serial debugging, and protocol analysis. Free online hex converter.

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Frequently Asked Questions

Hexadecimal (hex) encoding represents each byte as two characters 0-9 and A-F. It's the standard way to display binary data in a human-readable format.

Hex is used in serial port debugging, embedded programming, memory dumps, network packet analysis, color codes (#FF0000), MAC addresses, and debugging binary protocols.

Each character is converted to its byte value(s) using UTF-8, then each byte is shown as two hex digits. 'A' (65) becomes '41', 'Hello' becomes '48 65 6C 6C 6F'.

Hex uses 2 characters per byte (100% overhead), Base64 uses ~1.33 characters per byte (33% overhead). Hex is more readable; Base64 is more compact.

Each pair of hex digits represents one byte (0-255). '48' = 72 decimal = 'H' in ASCII. '00'-'7F' are ASCII, '80'-'FF' are extended characters.

Common formats: space-separated (48 65 6C), comma-separated (0x48, 0x65), continuous (48656C), C array format ({0x48, 0x65}).

Hex is used for byte arrays, register values, I2C addresses, SPI data, and EEPROM contents. const byte data[] = {0x48, 0x65, 0x6C};

Yes. All conversion happens in your browser using JavaScript. Your data never leaves your device.

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