UTF-8 Decoder

Convert UTF-8 Byte Sequences (Hex, Binary, Decimal) back to Text.

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UTF-8 Decoder
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About UTF-8 Decoder

This UTF-8 Decoder tool converts sequences of UTF-8 (Unicode Transformation Format - 8-bit) bytes back into human-readable text. UTF-8 is the most common character encoding on the internet, capable of representing any character in the Unicode standard.

You can input UTF-8 bytes in Hexadecimal (e.g., E2 82 AC), Binary (e.g., 11100010 10000010 10101100), or Decimal (e.g., 226 130 172) format. The tool will then decode these byte sequences to display the original text characters. For example, the UTF-8 bytes E2 82 AC (Hex) decode to the Euro symbol (€).

How to Use This Tool

  • Enter or paste the sequence of UTF-8 bytes into the "Enter UTF-8 Byte Sequence" input area.
  • Select the "Input Byte Format" of your codes (Hexadecimal, Binary, or Decimal).
  • Choose the "Separator Between Bytes" that is used in your input (e.g., Space, Comma, Newline, or a Custom string). If your codes are concatenated (e.g., E282AC), select "None".
  • Optionally, if your input bytes have a common prefix (like "0x" or "%"), enter it in the "Prefix on Each Byte (to remove)" field.
  • The decoded text will appear in the "Output Decoded Text" area automatically as you type or change options. You can also click the "Decode to Text" button.

All decoding is performed client-side in your browser using the built-in TextDecoder API for accuracy and security.

Frequently Asked Questions

What is UTF-8 Decoding?

UTF-8 decoding is the process of converting a sequence of UTF-8 encoded bytes back into their original string of characters. Since UTF-8 can represent characters using a variable number of bytes (1 to 4), the decoder needs to correctly interpret these byte sequences to reconstruct the correct Unicode code points and then the characters.

What input formats for bytes are supported?

You can provide the UTF-8 bytes as Decimal numbers (0-255), Hexadecimal numbers (00-FF), or Binary numbers (00000000-11111111).

How should the input bytes be separated?

The tool supports common separators like spaces, commas, or newlines. You can also specify a custom separator. If your bytes are concatenated without any separator (e.g., 48656C6C6F for "Hello" in Hex), choose "None"; the tool will attempt to parse based on expected byte lengths for the chosen format (e.g., 2 characters for Hex, 8 for Binary).

What if I provide an invalid UTF-8 byte sequence?

The tool uses the TextDecoder API with error checking (`fatal: true`). If the input byte sequence is not a valid UTF-8 sequence (e.g., an incomplete multi-byte character, or an overlong encoding), an error message will be displayed indicating that the input is invalid.

Is my input data sent to a server?

No. All UTF-8 decoding is performed locally in your web browser using JavaScript. Your input data is not transmitted to any external server.

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