Text to Hex Converter

Hexadecimal (base-16) is a human-readable representation of binary data. Every byte in computer memory is eight bits long, and each nibble (four bits) can be represented by a single hex digit (0–9, A–F). By converting text into hex, developers and engineers can inspect the exact byte values of a string, embed binary data in log files or configuration files, and ensure precise control over data transmitted at the lowest levels of a protocol stack.

This tool takes UTF-8 text as input, encodes it into its underlying bytes, then represents each byte as two hexadecimal digits. When `spaces: true` is set, the output inserts a space between every byte, improving readability when debugging or manually inspecting logs.

Any string of Unicode text. Internally, each character is first converted to its UTF-8 byte sequence. ASCII characters map to single bytes, while non-ASCII characters may map to two, three, or four bytes. No further preprocessing is required: you can paste in code snippets, emojis, or international text.

The output is a string of two-digit hex values. For example, the ASCII string `Hello` becomes `48 65 6C 6C 6F`. If you disable spacing (`spaces: false`), you get `48656C6C6F`—a compact representation often used in URLs or compact data embeds.

1. **UTF-8 Encoding**: Convert each character to its UTF-8 byte sequence. 2. **Byte to Hex Conversion**: For each byte value (0–255), compute its hexadecimal equivalent (00–FF). 3. **Concatenation**: Join the resulting hex pairs into one string, inserting spaces if enabled. 4. **Output**: Return the final hex string.

When troubleshooting an API or network protocol, seeing the exact byte values sent on the wire can reveal encoding mismatches or unexpected control characters. Hex dumps make it trivial to spot null bytes (`00`), line feeds (`0A`), or special UTF-8 sequences.

Embedding binary assets (like small images or font subsets) inside HTML or CSS often involves hex-encoding. This tool streamlines that process by generating the exact data you can paste into a style sheet or inline data URI.

Converting large texts (megabytes of data) may be CPU-intensive in pure JavaScript. We recommend chunked conversion on very large inputs, or offloading to a Web Worker. The algorithm scales linearly with input size and uses O(n) memory for the output string.

This converter is read-only—it does not execute code or eval input. However, be cautious when pasting untrusted binary data into other systems. Hex-encoded payloads may hide exploits in outdated text parsers or buffer-overflow-vulnerable native libraries. Always sanitize and validate decoded data if it’s fed back into sensitive systems.

`hello` → `68 65 6c 6c 6f`