String to Hex Converter — Encode Text as Hex Online
Encode any text string to its hexadecimal byte representation. Converts each character to its ASCII or Unicode code point displayed as hex pairs. Useful for debugging and encoding.
Key Features
Encodes plain text into UTF-8 byte sequences represented as hex pairs
Multiple delimiter choices: space-separated, comma-separated, or continuous string
Optional "0x" or "\x" prefixes for C, Python, and SQL strings
Accurate encoding for international characters, emojis, and symbols
How to Use
Type or paste your text string into the input editor.
Choose your delimiter formatting (spaces, commas, or continuous).
Optionally select prefix notation like 0x or \x.
Click "Convert to Hex" to view the byte codes.
Copy the resulting hex string to your clipboard.
Example
Sample input
Hi
Sample output
4869
Edge Cases
UTF-8 multi-byte characters
Space-delimited byte output option
Empty string yields empty hex
Frequently Asked Questions
How does string-to-hex encoding handle multi-byte characters like emojis?
Characters are encoded according to UTF-8 standards. Single ASCII characters yield one byte (two hex digits), while emojis and special characters yield 2 to 4 bytes.
Can I format the hex output for use in programming arrays?
Yes. You can choose "0x" prefixes with comma separation to produce code-ready byte arrays (e.g. 0x48, 0x65, 0x6c, 0x6c, 0x6f).
Is this the same as ASCII to hex?
For basic English letters and numbers, it matches standard ASCII. For non-ASCII symbols, it uses full UTF-8 encoding.
Privacy notice: when you run this tool, your input is sent over HTTPS to our server, processed in memory and returned. It is not stored or logged. Avoid pasting live secrets such as private keys or passwords.