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Python, 55 Bytes lambda x:chr(int(bin(ord(x))[2:].rjust(8,"0")[::-1],2)) Takes input as the actual byte, and outputs the actual byte. Try it online!
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# Python, 55 Bytes ```python lambda x:chr(int(bin(ord(x))[2:].rjust(8,"0")[::-1],2)) ``` Takes input as the actual byte, and outputs the actual byte. [Try it online!](https://tio.run/##K6gsycjPM/6fZhvzPycxNyklUaHCKjmjSCMzr0QjKTNPI78oRaNCUzPayCpWryirtLhEw0JHyUBJM9rKStcwVsdIU/N/QRFIcRpQS0FpiYYmUCQRAA)