Text to Hex
Convert any text to hexadecimal — encodes every character to its two-digit hex byte value instantly. Free, client-side hex encoder with no sign-up.
🔒 100% Client-Side Processing
Your data is processed entirely in your browser and never transmitted to any server.
0 / 100M Limit
Common Use Cases
Crafting protocol payloads
Encode command strings into hex bytes for serial devices, embedded firmware, or network protocol testing tools that take hex input.
Writing binary test data
Produce the hex representation of a known string to embed in test fixtures, packet builders, or hex-editor patches.
Comparing encodings
See the exact byte values of a string to diagnose encoding mismatches and invisible-character bugs.
Frequently Asked Questions
- What does the hex output represent?
- Each character's code point as a two-digit lowercase hex byte: "Hi" becomes 4869 (H=0x48, i=0x69). This is the standard representation used in packet dumps, hex editors, and protocol debugging.
- How are non-ASCII characters encoded?
- The tool encodes the UTF-16 code unit of each character, so characters above U+00FF produce values longer than one byte would suggest. For strict UTF-8 byte sequences, encode with TextEncoder in code instead. Looking for other conversions? Browse all data converters.
- Is my data private when I use this tool?
- Yes. This tool runs entirely in your browser using client-side JavaScript — nothing you type is transmitted to, logged by, or stored on any server. You can safely process confidential text, tokens, or code.