Text to Hexadecimal Converter Online

Convert text to hexadecimal representation instantly in your browser. This free tool encodes characters to their hex values client-side — nothing is sent to a server.

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Text ↔ Binary Converter

Convert text to binary, hexadecimal, octal, or decimal — and back. Supports full Unicode via UTF-8 encoding.

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Quick Reference — Text Encoding

How it works: Each character is first encoded to bytes using UTF-8, then each byte is represented in the selected number base (binary, hex, octal, or decimal).

Binary (Base 2): Uses digits 0 and 1. Each byte is 8 bits (e.g., "A" = 01000001). Fundamental to how computers store data.

Hexadecimal (Base 16): Uses 0-9 and a-f. Each byte is 2 hex digits (e.g., "A" = 41). Common in color codes, memory addresses, and debugging.

Octal (Base 8): Uses digits 0-7. Each byte is up to 3 octal digits (e.g., "A" = 101). Used in Unix file permissions.

Decimal (Base 10): Standard numbers 0-255 for each byte (e.g., "A" = 65). Same as ASCII values for the basic Latin alphabet.

Unicode support: Non-ASCII characters (emoji, CJK, etc.) produce multiple UTF-8 bytes. For example, "hello" in Chinese (你好) produces 6 bytes.

What is hexadecimal encoding?

Hexadecimal (base-16) is a number system that uses digits 0-9 and letters A-F. Each hex digit represents exactly 4 bits, so one byte (8 bits) is represented by exactly two hex digits. Hexadecimal is widely used in computing because it provides a compact, human-readable way to represent binary data. For example, the letter 'A' in ASCII is 0x41 in hex.

Common use cases for text to hex conversion

Text to hex conversion is essential in web development for URL encoding and HTML color codes, in network analysis for inspecting packet data, in cryptography for viewing hash outputs and encryption keys, and in low-level programming for memory debugging. It is also used in CSS to define colors (like #FF5733) and in protocol analysis.

Frequently Asked Questions

What is the difference between hex and binary encoding?

Both represent the same underlying data. Hex is simply a more compact notation — each hex digit represents 4 binary digits. So the binary 01000001 becomes the hex 41. Hex is preferred for readability when working with byte-level data.

How is hexadecimal used in web development?

Hex is used extensively in web development for CSS colors (#RRGGBB format), URL-encoded characters (%20 for a space), Unicode escape sequences (\u0041), and viewing encoded data in developer tools.