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UTF-8 to Hex Converter

Convert UTF-8 text to hexadecimal byte sequences instantly. Perfect for developers working with character encodings, binary data, and network protocols.

Quick examples:
Your hexadecimal output will appear here...

πŸ“ Byte Breakdown

Character Hex Bytes Type

πŸ’‘ How to Use This Tool

Convert any UTF-8 text to hexadecimal bytes in seconds. Follow these simple steps:

1

Enter Your Text

Type or paste any text including letters, numbers, symbols, and emoji.

2

Choose Options

Select your preferred separator (space, colon, none) and case (upper/lower).

3

View Result

Your hex output appears instantly. Toggle "Show bytes" for character breakdown.

4

Copy Result

Click "Copy" to copy the hexadecimal output to your clipboard.

πŸ“– About UTF-8 to Hex Converter

What is UTF-8 to Hex Conversion?

UTF-8 to Hex conversion transforms human-readable text into hexadecimal byte sequences. Each byte is represented as two hexadecimal digits (00-FF). This is essential for developers working with binary data, network protocols, and file formats.

How UTF-8 to Hex Conversion Works

UTF-8 uses variable-length encoding (1-4 bytes per character). This tool converts each character to its UTF-8 byte representation:

  • ASCII characters (A-Z, a-z, 0-9): 1 byte each (e.g., "A" β†’ 41)
  • Accented characters (Γ©, Γ±, ΓΌ): 2 bytes each (e.g., "Γ©" β†’ C3 A9)
  • CJK characters (δΈ­, ζ—₯, ν•œ): 3 bytes each (e.g., "δΈ­" β†’ E4 B8 AD)
  • Emoji (πŸ˜€, πŸŽ‰, ❀️): 4 bytes each (e.g., "πŸ˜€" β†’ F0 9F 98 80)

Common Use Cases

  • Debugging Network Packets: Encode HTTP headers and payloads for analysis
  • Creating Binary Files: Generate hex data for file headers
  • Encoding URL Data: Convert strings to percent-encoded format
  • Database Storage: Store text as hex in BLOB fields
  • API Development: Debug request/response payloads
  • Reverse Engineering: Analyze string representations in binaries

Privacy & Security

This tool runs entirely in your browser using JavaScript. Your data is never sent to any serverβ€”all conversion happens locally on your device.

Technical Details

  • Supports all Unicode characters including emoji
  • Outputs hex with configurable separator (space, colon, no separator)
  • Shows uppercase or lowercase hex output
  • Displays byte-by-byte breakdown for educational purposes

❓ Frequently Asked Questions

Yes! All conversion happens locally in your browser using JavaScript. Your data never leaves your device and is not sent to any server.
This tool can convert any Unicode character including ASCII letters, numbers, accented characters, CJK characters (Chinese, Japanese, Korean), emoji, and special symbols.
UTF-8 uses 1-4 bytes per character. ASCII characters (0-127) use 1 byte. Extended characters use 2-4 bytes, with leading bits indicating the byte count: 110xxxxx (2 bytes), 1110xxxx (3 bytes), or 11110xxx (4 bytes).
You can choose between space-separated hex (48 65 6C 6C 6F), colon-separated (48:65:6C:6C:6F), or no separator (48656C6C6F). You can also toggle between uppercase and lowercase output.
Yes! Emoji are fully supported. For example, πŸ˜€ converts to F0 9F 98 80 (4 bytes in UTF-8 encoding).