Hex Encode / Decode

// Encode Tools

Hex Encode / Decode

Convert plain text to hexadecimal encoding and back. Supports UTF-8, with options for uppercase, spacing, and prefix formatting.

✓ Free · Instant 100% Client-Side Encode · Decode UTF-8 Support

0x Hex

💡 Enter any text below and it will be instantly encoded to hexadecimal. Each character is represented as its UTF-8 byte value(s) in hex.

Plain Text

Hex Output

⚠ Invalid hex string. Make sure input contains only valid hexadecimal characters (0–9, a–f).

⚙️ Options

Mode

Output Formatting

Uppercase hex (A–F)

Space between bytes

0x prefix per byte

Group by

Adds a newline after N bytes for readability.

ℹ️ About Hex

What is Hex Encoding?

Hexadecimal (base-16) uses 16 symbols: 0–9 and A–F. Each byte of data (0–255) is represented as two hex digits. For example, the letter "A" is 41 in hex.

Use Cases

🔐 Cryptography — hash values, keys, IVs

🌐 Networking — MAC addresses, packet data

💻 Programming — color codes (#FF6600), memory addresses

🗃️ Debugging — inspecting binary file content

UTF-8 Note

Characters outside ASCII (like accented letters or emoji) may produce 2–4 hex bytes each, since this tool uses UTF-8 encoding.

Examples

Hello → 48 65 6C 6C 6F
0x prefix → 0x48 0x65 …
no space → 48656C6C6F

Quick Samples