Byte Array to String Converter

About this tool

Convert text into its UTF-8 byte values, or turn a comma/space-separated list of byte values back into text.

Example

Input: Hi

Output: 72, 105

Privacy

This tool runs entirely in your browser. Your data is processed locally and never uploaded to a server.

How to use this tool

1. Paste a text string or a comma or space separated list of byte values into the input box.
2. Choose whether you want text converted to bytes or bytes converted back to text.
3. Read the instant result in the output area and copy it if needed.
4. If the result looks wrong, check separators, encoding, and whether every byte value is between 0 and 255.

Step by step, what happens

1. When you enter text, the tool reads the characters as UTF-8 and turns them into byte values.
2. When you enter a byte list, the tool splits the numbers by commas or spaces and treats each item as one byte.
3. For byte-to-text conversion, the tool rebuilds the original string from those UTF-8 bytes.
4. If a byte list is invalid or incomplete, the output may be incorrect or fail because UTF-8 requires valid byte sequences.

Worked example

A common use is checking the UTF-8 bytes for a short greeting and then turning those bytes back into the same text.

Input: Hi

1. The tool reads the letters H and i as text.
2. It converts them to their UTF-8 byte values.
3. If you switch to byte-to-text mode and enter those bytes, it decodes them back to the original string.

Tips and common mistakes

• Use decimal byte values, not hex, unless your byte list has already been converted to decimals.
• Separate byte values with commas, spaces, or both, since the tool accepts either format.
• Remember that non-ASCII text can use multiple bytes in UTF-8, so one character may become several byte values.
• If a decoded result looks strange, make sure the bytes are valid UTF-8 and not from a different encoding.

Frequently asked questions