Hex to String Converter

Convert text to and from hexadecimal strings with flexible spacing, prefix (0x/\x/U+), and case options

Key Facts

Category
Conversion & Encoding
Input Types
textarea, select
Output Type
text
Sample Coverage
4
API Ready
Yes

Overview

The Hex to String Converter is a versatile utility that allows you to seamlessly encode plain text into hexadecimal format or decode hex strings back into readable text. Supporting UTF-8, ASCII, and Latin-1 encodings, the tool offers customizable formatting options including custom prefixes (like 0x or \x), letter casing, and space separators to match your exact data requirements.

When to Use

  • •When analyzing raw network packets, binary payloads, or log files containing hexadecimal representations of text.
  • •When formatting text data into hex arrays for programming languages, microcontrollers, or database queries.
  • •When decoding obfuscated hex strings back into readable UTF-8, ASCII, or Latin-1 text.

How It Works

  • •Input your text or hexadecimal string into the input field.
  • •Select the operation (Text to Hex or Hex to Text) and choose your target encoding (UTF-8, ASCII, or Latin-1).
  • •Configure formatting preferences such as prefixes (0x, \x, U+), letter case, and separators if you are encoding text.
  • •The tool instantly processes the input and displays the converted output.

Use Cases

Debugging embedded systems by converting raw hex sensor outputs into readable ASCII text.
Formatting payload strings into hex format with '0x' prefixes for smart contract development or assembly code.
Decoding URL-encoded or hex-escaped characters found in web server logs or database records.

Examples

1. Decoding Network Packet Payloads

Network Security Analyst
Background
An analyst is inspecting a packet capture and extracts a hex payload: '48 65 6c 6c 6f 20 57 6f 72 6c 64'.
Problem
The analyst needs to quickly read the plain text content of this hex payload to identify potential threats.
How to Use
Paste the hex string into the input, set the operation to 'Hex to Text', and select 'UTF-8' encoding.
Example Config
Operation: decode, Encoding: utf-8
Outcome
The hex string is successfully decoded to 'Hello World'.

2. Formatting Hex Strings for Firmware Code

Embedded Systems Developer
Background
A developer needs to hardcode the initialization string 'START' into a microcontroller's firmware as a hex array.
Problem
The compiler requires the string to be formatted as hex bytes prefixed with '\x' without spaces.
How to Use
Input 'START' into the text area, select 'Text to Hex', choose the '\x' prefix, set the separator to 'None', and select 'ASCII' encoding.
Example Config
Operation: encode, Encoding: ascii, Prefix: \x, Separator: none, Case: upper
Outcome
The text is converted to '\x53\x54\x41\x52\x54', ready to be pasted directly into the C source code.

Try with Samples

text
Hex/Unicode Encoding Format Samples
Examples of hex (\xXX) and unicode (\uXXXX) escape sequence encoding formats
title token hex
text
Android String Processing Java Samples
Android Java string processing examples including string split and join, regular expressions, and string replacement
title token string
text
Android String Processing Kotlin Samples
Android Kotlin string processing examples including string split and join, regular expressions, and string replacement
title token string
text
macOS String Processing Objective-C Samples
macOS Objective-C string processing examples including NSString, NSMutableString, searching, regex, and encoding
title token string
text

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FAQ

Can I decode hex strings that contain prefixes like '0x' or '\x'?

Yes, the decoder automatically handles common prefixes and spaces when converting hex back to text.

Which character encodings are supported?

The converter supports UTF-8, ASCII, and Latin-1 (ISO 8859-1) encodings.

How do I format the hex output for C-style arrays?

Set the operation to 'Text to Hex', choose the '\x' or '0x' prefix, and set the separator to space or none.

Does the tool support uppercase hex characters?

Yes, you can choose between lowercase (a-f) and uppercase (A-F) outputs when encoding text.

Can I convert non-English characters?

Yes, by selecting the UTF-8 encoding option, you can convert Unicode characters and emojis to and from hex.

API Documentation

Request Endpoint

POST /en/api/tools/hex-to-string

Request Parameters

Parameter Name Type Required Description
inputText textarea Yes -
operation select Yes -
encoding select No -
prefix select No -
case select No -
separator select No -

Response Format

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}
Text: Text

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-hex-to-string": {
      "name": "hex-to-string",
      "description": "Convert text to and from hexadecimal strings with flexible spacing, prefix (0x/\x/U+), and case options",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=hex-to-string",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]