Professional online tool to convert between text and hexadecimal (base-16). Support ASCII, UTF-8, and multiple formatting options with real-time conversion.
Input Hello
Explanation: Each character is converted to its hexadecimal ASCII value (H=0x48, e=0x65, l=0x6C, o=0x6F) Each character is converted to its hexadecimal ASCII value (H=0x48, e=0x65, l=0x6C, o=0x6F)
Input 54 68 65 20 71 75 69 63 6b 20 62 72 6f 77 6e 20 66 6f 78
Input 2025 @ #
Input 🦊 (fox emoji)
Explanation: UTF-8 emojis require multiple bytes (4 bytes for this fox emoji) UTF-8 emojis require multiple bytes (4 bytes for this fox emoji)
Hexadecimal (base-16) is a numbering system that uses 16 symbols: 0-9 and A-F. It's widely used in computing because one hex digit represents exactly 4 bits (half a byte), making it perfect for representing binary data in a compact, human-readable format.
Each character in text is represented by its numeric value in the character encoding (usually ASCII or UTF-8). This number is then converted to base-16 notation. For example, 'A' has ASCII value 65 (decimal) = 41 (hex).
Hexadecimal is essential in programming for memory addresses, color codes (#FF5733), MAC addresses, cryptographic hashes, file signatures, character encodings, and debugging binary data.
Cryptographic operations often output binary data that's encoded as hexadecimal for display. Hash functions (MD5, SHA-256) and encryption keys are typically shown in hex format for readability and portability.
Decimal → Hex:
0-9 → 0-9
10 → A, 11 → B, 12 → C
13 → D, 14 → E, 15 → F
16 → 10, 255 → FF
0-9 → 0-9
10 → A, 11 → B, 12 → C
13 → D, 14 → E, 15 → F
16 → 10, 255 → FF
• Use "0x" prefix to indicate hex values
• 2 hex digits = 1 byte = 8 bits
• Uppercase vs lowercase is convention
• Always validate hex strings before decoding
Hexadecimal encoding is used extensively in programming and computing: representing memory addresses, color codes in web design (#RRGGBB), MAC addresses, binary file analysis, cryptographic hashes, URL encoding, and character escape sequences. It provides a compact way to represent binary data in a human-readable format.
To convert text to hex: 1) Select "Text (UTF-8)" as input format and "Hexadecimal" as output. 2) Enter your text in the input box. The tool will convert it in real-time. Each character will be converted to its hex value (e.g., 'A' becomes 41). The tool automatically handles UTF-8 encoding for international characters and emojis.
ASCII uses 1 byte per character (128 characters max), while UTF-8 uses 1-4 bytes depending on the character. For basic English text (A-Z, 0-9), they're identical. But UTF-8 can represent all Unicode characters including emojis, Chinese characters, etc. For example, "A" is 41 in both, but "你" is E4 BD A0 in UTF-8 (3 bytes).
To decode hex to text: 1) Select "Hexadecimal" as input format and "Text (UTF-8)" as output. 2) Enter hex values (with or without spaces, with or without 0x prefix). The tool automatically removes spaces and prefixes, then converts each hex pair to its corresponding character.
Yes! Select "Hexadecimal" as input and "Binary" as output. Each hex digit converts to exactly 4 binary digits (bits). For example: F (hex) = 1111 (binary), A (hex) = 1010 (binary). This conversion is useful for understanding bitwise operations and low-level programming.
The byte viewer displays data in a professional hex dump format, similar to hex editors. It shows: memory addresses on the left, hexadecimal values in the middle, and ASCII representation on the right. This format is standard in debugging, reverse engineering, and file analysis.
Yes, hexadecimal conversion is completely reversible. Converting text to hex and back to text will give you the original data, as long as the correct character encoding (UTF-8) is used. This makes hex a reliable format for data transmission and storage.
Hexadecimal aligns perfectly with binary: 1 hex digit = 4 bits, 2 hex digits = 1 byte. This makes it more compact than binary (4x shorter) and more intuitive for computing than decimal. It's also easier to convert between hex and binary mentally, which is why programmers prefer it.
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