Skip to content
NMSnabbit.

String to Byte Converter

Convert a string to its UTF-8 byte values in decimal (0–255).

Encoders & Decoders Runs in your browser

How do you convert a string to bytes?

Characters and bytes are not the same thing, and this tool shows the gap. It UTF-8 encodes whatever you type and lists each byte as a decimal from 0 to 255: “Hi” yields 72 105, while “é” yields 195 169 because it occupies two bytes. Handy when you need an array literal for embedded code or want to see why a string’s byte length exceeds its character count.

How to use the String to Byte

  1. 1 Type a string, or paste one from your source code.
  2. 2 Read off the space-separated decimal values, one per UTF-8 byte.
  3. 3 Multibyte characters show as runs of two to four numbers.
  4. 4 Copy the sequence into your array literal.

What you can use it for

  • Building a byte array literal for code.
  • Inspecting how a string is stored in memory.
  • Preparing byte test data for low-level functions.
  • Teaching the difference between characters and bytes.

Frequently asked questions

Are these the same as ASCII codes?
Only for characters below 128, where UTF-8 and ASCII agree. Beyond that they diverge: “ñ” is one character but two bytes, 195 177, neither of which is an ASCII code.
What is the range of each value?
0 to 255, since each number is one octet. A value from 194 to 244 opens a multibyte sequence; 128 to 191 marks a continuation byte.
How do I rebuild the string?
Feed the numbers to the Byte to String converter, which reassembles UTF-8 sequences into characters. Any decoder that accepts a byte array does the same job.

Related tools

Byte to String Decode decimal byte values (0–255) back into a UTF-8 string. String to Int Convert a string to integer Unicode code points, space-separated. Text to Base64 Encode any text, including emoji and accents, into a Base64 string.

More Encoders & Decoders

More tools like this:

All Encoders & Decoders