Hex Encoder

Convert text to hexadecimal (UTF-8 bytes). Outputs a continuous lowercase hex string with no spaces or 0x prefixes.

  • Runs entirely in your browser
  • No data stored or sent to a server
  • Free forever — no signup
  • Instant conversion

Input and Output

Use the interactive encoder and decoder on this page to process your text.

Learn more about hex encoding

How to Convert Text to Hexadecimal

Hex Encoding

When to Hex-Encode Text

Convert text to hex when inspecting byte values, debugging character encodings, preparing payloads for low-level protocols, or comparing hashes and binary representations in logs.

Real-World Examples

A → 41 (ASCII)

Hi → 4869

Inspecting UTF-8 bytes for emoji or accented characters in network captures

Common Mistakes

  • Mixing uppercase and lowercase without normalizing when comparing values
  • Assuming hex output includes 0x prefixes (depends on convention)
  • Confusing hex encoding with hashing — hex is reversible representation, not a digest

Edge Cases

  • Unicode text produces multi-byte sequences — hex length varies by character
  • Some tools insert spaces between bytes; others return a continuous string

Performance Considerations

Hex doubles the visible character count compared to raw bytes and is slower to parse than binary. Use it for inspection and debugging, not high-throughput storage.

Developer Tips

  • Node.js: Buffer.from(str, 'utf8').toString('hex')
  • Normalize case when diffing hex dumps from different tools

Frequently asked questions

Is hex encoding the same as encryption?

No. Hex is a readable representation of bytes and can be reversed directly to the original data.

Why is my hex output longer for emoji or accented letters?

Those characters use multiple bytes in UTF-8, so each byte appears as two hex digits.

Should hex strings include spaces between bytes?

Both formats exist. This tool outputs a continuous hex string; add spacing manually if you need byte grouping.