ASCII to Hex Converter
Convert ASCII text to hexadecimal instantly with our free online tool.
All conversions happen in your browser. No data is sent to our servers. Press Cmd/Ctrl + Enter to convert.
How to Convert ASCII to Hex
Type or paste your text into the input panel and click Convert. Each character is converted to its hexadecimal byte representation.
What is ASCII?
ASCII is the standard character encoding for text. Each character has a numeric value from 0-127. Extended ASCII and UTF-8 extend this to support international characters.
What is Hexadecimal?
Hexadecimal is a base-16 number system. It's commonly used in computing to represent binary data in a compact, human-readable format. Each byte is shown as two hex digits.
Common Use Cases
ASCII to hex conversion is used when encoding data for transmission, debugging character encoding issues, creating hex strings for programming, or working with binary protocols.
Frequently Asked Questions
What output format is used?
By default, hex bytes are output in lowercase with spaces between bytes (e.g., '48 65 6c 6c 6f'). This is the most readable format.
Can I convert Unicode characters?
Yes, the converter encodes text as UTF-8 bytes, properly handling international characters and emojis.
Why would I need text in hex format?
Hex representation is useful for debugging, encoding data for protocols that require hex, or working with systems that don't support certain characters.
Is the conversion reversible?
Yes, you can use our Hex to ASCII converter to convert the hex back to the original text.