ASCII to HEX Converter
Convert text into hexadecimal bytes and decode hexadecimal back into readable text. This free ASCII to HEX converter works instantly in your browser, supports UTF-8 text, and lets you copy the result.
How to use the ASCII to HEX converter
- Select Text to HEX to encode text as hexadecimal bytes.
- Enter or paste your text in the input box.
- The result updates automatically. You can also click Convert.
- Click Copy Result to copy the output.
- Select HEX to Text to decode hexadecimal byte values back into text.
Hexadecimal input can contain spaces or line breaks between bytes. Each byte must contain exactly two hexadecimal digits.
ASCII to hexadecimal examples
Select an example to load it into the converter.
Hello
48 65 6C 6C 6F
ABC
41 42 43
123
31 32 33
42 69 6E 61 72 69 6F 73
Binarios
What is hexadecimal encoding?
Hexadecimal, commonly called hex, is a base-16 number system that uses the digits 0–9 and letters A–F. Each hexadecimal digit represents four bits. Two hexadecimal digits therefore represent one byte, or eight bits.
Computers store text as bytes according to a character encoding. ASCII defines values for 128 characters, including English letters, numbers, punctuation and control characters. UTF-8 preserves the ASCII byte values for those characters and also encodes characters from many other writing systems using multiple bytes.
For example, the ASCII character A has decimal value 65,
binary value 01000001, and hexadecimal value
41. The word Hello becomes
48 65 6C 6C 6F when encoded as UTF-8.
Hexadecimal is commonly used when debugging software, inspecting network data, analyzing file contents, reading memory dumps, and working with protocols or embedded systems.
ASCII versus UTF-8
ASCII represents 128 defined character values. UTF-8 is a Unicode encoding that uses one to four bytes per Unicode code point. ASCII characters use the same single-byte values in both encodings.
This converter uses UTF-8 for text input. For characters outside the
ASCII range, the result may contain multiple bytes. For example, the
character é is encoded in UTF-8 as C3 A9,
while its representation in other character encodings may differ.
If you need to inspect individual character values, use an ASCII table. If you need to convert between binary, decimal and hexadecimal number representations, use a number base converter.