ascii
ASCII Decoder
Convert ASCII codes to text
2 free tools
ASCII (American Standard Code for Information Interchange) assigns a numeric code to every printable character. These tools let you convert plain text to ASCII decimal values and decode ASCII codes back to text — useful for debugging character encoding issues, teaching computing fundamentals, or inspecting binary data streams.
ASCII maps each character to a number from 0–127. For example, 'A' is 65 and 'a' is 97. Encoding converts text to those numbers; decoding reverses the process.
ASCII is a subset of UTF-8. The first 128 UTF-8 characters are identical to ASCII, so ASCII-encoded text is also valid UTF-8.
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