Text to Hex
Convert text to hexadecimal values. Choose uppercase/lowercase, separator style, and optional 0x prefix. Full conversion table with ASCII, hex, binary and decimal.
✅ Free ⚡ Live 🎛️ Format Options 🔒 Private
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Text to Hex Converter ⚡ Live⚡
Live Conversion
Hex output updates instantly as you type with your chosen format settings.
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Full Format Control
Uppercase/lowercase, separator (space, colon, dash, none), 0x prefix toggle.
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Conversion Table
Character → ASCII → hex → binary for every character in your text.
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100% Private
All conversion uses charCodeAt(0).toString(16) in your browser.
⭐ User Reviews
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Ryan T.
1 week ago
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The live mode is a game changer. See the encoded output update in real time as you type — no button needed.
Encoder ToolsK
Kira M.
2 weeks ago
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More reliable than similar tools. Works entirely in the browser so I can use it offline and trust my data stays private.
Encoder ToolsF
Felix K.
2 weeks ago
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The character breakdown table is fantastic for understanding what changed. I use this to teach encoding concepts to my team.
Encoder ToolsN
Nadia R.
3 weeks ago
⭐⭐⭐⭐⭐
Clean, fast, no registration required. The copy button works every time and the stats row gives a great summary.
Encoder Tools📖 How to Use
1
Enter your text
Type or paste any text into the input field.
2
Choose format
Select case, separator and whether to include 0x prefix.
3
View the table
The conversion table shows char, ASCII, hex, and binary side by side.
4
Copy the hex
Click Copy Hex to get the formatted hex output.
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❓ FAQ
How is text converted to hex?+
Each character is looked up by its ASCII code point. That decimal number is converted to base 16 (hexadecimal). "H" = ASCII 72 = hex 48. The result is padded to 2 digits.
What is colon-separated hex used for?+
Colon-separated hex (like 48:65:6C) is commonly used in MAC addresses (hardware addresses) and some cryptographic output formats. The format is identical in value, just a different separator convention.
When should I use uppercase vs lowercase hex?+
Both are valid and represent the same values. Uppercase (48 65 6C) is traditional in assembly and C. Lowercase (48 65 6c) is common in web development, CSS colours and modern programming. HTML colour codes conventionally use uppercase.
What does 0x mean as a prefix?+
0x before a hex number is C/C++ and JavaScript notation for hexadecimal literals. It tells compilers and interpreters "this is hex, not decimal". E.g. 0x48 means hex 48 (decimal 72). Useful when outputting hex for code.
Can I convert emoji and Unicode to hex?+
Yes. Unicode characters above 127 will produce values larger than 0xFF. For example, emoji have code points in the range 0x1F000–0x1FFFF. Note that multi-byte UTF-8 encoding and JavaScript's charCodeAt() return different values for characters above U+FFFF.