Hex Encoder / Decoder
Encode or decode hexadecimal text.
Encode or decode hexadecimal text.
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Tool guide
Free Online Hex Encoder / Decoder
Convert Unicode text into uppercase, space-separated hexadecimal UTF-8 bytes, or decode complete hex byte pairs back into text. Use it for text payload inspection, byte examples, and simple developer debugging.
Steps
How it works
- Choose Text to Hex or Hex to Text.
- Enter text, or paste hexadecimal byte pairs with optional whitespace.
- Convert through the browser's UTF-8 text encoder or decoder.
- Copy or download the result.
Highlights
Key features
- Encodes text using UTF-8 bytes.
- Outputs uppercase two-digit hex pairs separated by spaces.
- Accepts uppercase or lowercase hexadecimal input.
- Ignores whitespace between hex byte pairs when decoding.
- Rejects invalid hexadecimal digits and odd-length input.
- Provides text-file input, copy, and text download actions.
Use cases
Common uses
- Inspect the UTF-8 hex bytes for text.
- Convert an ASCII-compatible string to hexadecimal.
- Decode a clean hexadecimal text payload.
- Create byte-level examples for documentation and tests.
Notes
Limitations to know
- The tool uses UTF-8 bytes rather than UTF-16 code units, Unicode code points, or arbitrary numeric values.
- The 0x prefix and punctuation delimiters are not accepted; decoding removes whitespace only.
- Hex input must contain complete byte pairs.
- Malformed UTF-8 bytes may decode with replacement characters rather than readable source text.
- Binary files are not accepted, and hexadecimal encoding is not hashing, encryption, or security.
FAQ
Frequently asked questions
Does Hex Encoder use UTF-8 or ASCII?
It uses UTF-8. ASCII characters have familiar single-byte values, while other Unicode characters can produce multiple byte pairs.
Can I include 0x before hex values?
No. Enter hexadecimal digits only, with optional whitespace between byte pairs.
Can hex input contain spaces or line breaks?
Yes. Whitespace is removed before the byte pairs are decoded.
Are uppercase and lowercase hex equivalent?
Yes for decoding. Encoded output is formatted in uppercase.
Why does an emoji produce several hex pairs?
Emoji require multiple bytes in UTF-8, and the tool displays each byte as one pair.
Is hex encoding encryption?
No. Hex is a readable representation of byte values and provides no secrecy.