Convert text to ASCII (Decimal) values and back instantly
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| Dec | Hex | Char | Description |
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Standard ASCII codes range from 0 to 127. Values 128+ are part of extended ASCII or Unicode.
ASCII is a 7-bit encoding representing 128 characters (0-127), covering English letters, digits, and basic symbols. Unicode is a universal standard supporting over 140,000 characters, including emojis and scripts from all languages. ASCII is essentially a subset of Unicode.
ASCII codes are fundamental in computing for character representation, data storage, and transmission. They're used in serial communication (Arduino/Raspberry Pi), file encoding, network protocols, and low-level programming where characters need to be processed as numerical values.
Yes! Our converter uses UTF-8 encoding by default, which supports all Unicode characters (including extended ASCII). For pure ASCII mode, values above 127 will be converted but may not display correctly in all systems since ASCII officially ends at 127.