Encoding
AvailableHex Encoder/Decoder
Convert UTF-8 text and hexadecimal bytes locally.
Text
Enter UTF-8 text to encode locally.
Binary bytesRead-only
Conversion output appears here.
Read-only output remains selectable and can be copied manually.
Options
Decode expects exactly the selected separator. Every byte must contain eight bits.
Your text stays in your browser.
Nothing you enter is uploaded or automatically saved. Conversion, copying, and downloads happen only in your browser.
Statistics
Input: 0 characters · 0 lines
Output: 0 characters · 0 lines
UTF-8 bytes: 0 · Binary byte count: 0
Total bits: 0 · Expansion ratio: —
What this binary tool represents
Binary represents each UTF-8 byte with eight bits. A is 01000001, é is 11000011 10101001, and 🚀 is 11110000 10011111 10011010 10000000.
UTF-8 bytes are not Unicode code points
This tool works with the bytes used to encode text, not Unicode code points. For example, é is U+00E9 as a code point but has two UTF-8 bytes. Use Unicode Converter when you need U+ values or escapes.
How to use
- Choose Text → Binary or Binary → Text.
- Select the output format separator.
- Enter text or exact selected-format bytes; results update locally.
- Copy, download, or move the result into the opposite direction.
Privacy
Conversion happens entirely in your browser. No text is sent to a server, placed in URLs, logged, or automatically stored.
Frequently asked questions
Why does an emoji use multiple binary bytes?
UTF-8 uses one to four bytes per Unicode code point. Emoji commonly need four bytes.
Why is é two bytes?
C3 A9 is the UTF-8 byte sequence for é. Its Unicode code point value is not its UTF-8 encoding.
Why is my binary input invalid?
Use only 0 and 1, eight bits for every byte, and exactly the selected separator. Compact input must have a length divisible by eight.
Why can valid binary still fail decoding?
Binary can describe any byte values, but not every byte sequence is valid UTF-8 text. Invalid UTF-8 is reported without replacement characters.
Practical guide
When to use it
Use it to inspect or explain UTF-8 bytes as bits, or to decode a byte sequence that is already written in binary.
Three steps
- Choose text-to-binary or binary-to-text.
- Select a separator and paste the text or groups of eight bits.
- Convert and confirm that the bytes form valid UTF-8 text.
Example and a common mistake
The ASCII letter A is the byte 01000001.
Every byte needs eight bits; a string of valid-looking 0s and 1s cannot decode if its grouping is incomplete.
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