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ASCII to Hex Converter

ASCII text to hex code converter. Convert string to hex and back instantly. Two-way conversion with formatted output, character count, and byte size. Great for debugging, data encoding, and working with protocols.

Text

Quick examples:

Hex result will appear here

Formatted (with spaces):

—

Characters:

0

Bytes:

0

How it works: Each ASCII character is converted to its hexadecimal code value (00 to 7F for standard ASCII).

Example: 'A' = Hex 41, 'a' = Hex 61, '0' = Hex 30

How It Works

  1. 1

    Enter Your Text

    Type any ASCII text in the input field or paste from your clipboard. The tool supports letters, numbers, symbols, and special characters.

  2. 2

    Converts in Real-Time

    The tool converts each character to its hexadecimal representation using ASCII character codes. Results appear instantly.

  3. 3

    View Results

    See the converted hexadecimal value with formatted output, character count, and byte size information.

  4. 4

    Copy the Result

    Click the copy button to copy the result to your clipboard. Switch modes anytime to convert hex back to ASCII text.

Use Cases

  • URL Encoding

    Convert special characters to hex format for URL encoding. Useful when building APIs or working with query strings.

  • Data Transmission

    Encode text data in hexadecimal format for transmission over networks, serial communication, and protocols that require hex encoding.

  • Debugging & Logging

    Analyze text data at the byte level, inspect control characters, and debug encoding issues in your applications.

  • Hex Editors

    Prepare text data for hex editor tools, binary file analysis, and low-level data manipulation tasks.

  • Protocol Development

    Work with communication protocols, packet analysis, and network programming that use hexadecimal text representations.

  • Cryptography & Hashing

    Prepare input data for cryptographic functions, hash algorithms, and security applications that work with hex-encoded text.

Frequently Asked Questions

Space → 20 · ! → 21 · " → 22 · # → 23 · $ → 24 · % → 25 · & → 26 · ' → 27 · ( → 28 · ) → 29 · 0 → 30 · 1 → 31 · 2 → 32 · ... · 9 → 39 · A → 41 · B → 42 · C → 43 · ... · Z → 5A · a → 61 · b → 62 · c → 63 · ... · z → 7A. Printable ASCII spans hex 0x20 to 0x7E. The tool above handles the full table automatically.
Hello → 48 65 6C 6C 6F · ABC → 41 42 43 · 123 → 31 32 33 · hi! → 68 69 21 · @ → 40 · # → 23. Each character maps to its 2-digit hexadecimal ASCII code. Paste any string into the tool above and the conversion runs instantly.
Use `xxd` or `od`: `echo -n "Hello" | xxd -p` outputs `48656c6c6f`. Or with `od`: `echo -n "Hello" | od -An -tx1` outputs the hex codes separated by spaces. For a single character: `printf '%x\n' "'A"` outputs `41`. The tool above gives you the same result without leaving your browser.
Use `.encode().hex()`: `"Hello".encode().hex()` returns `'48656c6c6f'`. To go back: `bytes.fromhex('48656c6c6f').decode()` returns `'Hello'`. For one character: `format(ord('A'), '02x')` returns `'41'`.
ASCII assigns each character a numeric code (0-127). These codes can be written as hexadecimal numbers. For example, 'A' is 65 in decimal, or 41 in hex.
To convert ASCII to hex manually: 1) Find the ASCII code of each character (e.g., 'A' = 65), 2) Convert the decimal ASCII code to hexadecimal (65 = 41 in hex), 3) Ensure each hex value is 2 digits (pad with leading zero if needed). Our tool automates this process instantly for any length of text.
ASCII is a character encoding system that assigns numeric codes to characters. Hexadecimal is a base-16 number system (0-9, A-F) used to represent those numeric codes. This tool converts ASCII characters to their hexadecimal representation, making it easier to work with character data in hex format.
Yes! The tool is bidirectional. Switch to 'Hex to ASCII' mode using the toggle button. Enter hex values (with or without spaces, with or without 0x prefix), and the tool will convert them back to readable ASCII text. Perfect for decoding hex-encoded messages.
Hex conversion is useful for URL encoding, data transmission, debugging, working with binary files, protocol development, and cryptography. Many systems and protocols use hexadecimal representation of text because it's compact and directly maps to binary data (each hex digit = 4 bits).
Yes! The tool converts all ASCII characters including letters, numbers, spaces, punctuation marks, and special symbols. Each character is converted to its 2-digit hexadecimal code. Non-printable control characters (like newlines and tabs) are also converted correctly.
The tool outputs uppercase hexadecimal values. Each character converts to a 2-digit hex code (e.g., 'A' becomes '41'). The formatted output includes spaces between each hex pair for readability. You can copy the output with or without spaces based on your needs.
While this tool converts text to hex, it is NOT encryption or hashing. Hex encoding is reversible and provides no security. For passwords and sensitive data, use proper encryption algorithms and hashing functions like bcrypt, SHA-256, or AES encryption.
Hex encoding uses base-16 (0-9, A-F) and represents each byte as 2 hex characters, resulting in 2x size increase. Base64 uses 64 characters and is more space-efficient (1.33x size increase). Hex is more human-readable and commonly used in low-level programming, while Base64 is preferred for encoding binary data in text formats like JSON or XML.
Yes. Everything runs in your browser - no data leaves your device. Works offline too.

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