Text to ASCII Converter Online

ASCII (American Standard Code for Information Interchange) assigns a numeric code to each character. Converting text to ASCII codes is useful when debugging byte-level data, working with serial communication protocols, or learning how text is represented in memory.

How it works

The tool iterates over each character in your input string and calls JavaScript's charCodeAt() method to get the decimal ASCII value. For characters outside the standard 0–127 ASCII range, it returns the Unicode code point. Output can be formatted as decimal, hexadecimal, octal, or binary.

How to use it

1. Type or paste your text into the input field
2. Choose output format: decimal, hex, octal, or binary
3. Each character's code appears in the output, separated by spaces or your preferred delimiter
4. Click copy to grab the result

A few things worth knowing

• ASCII covers only 128 characters (0–127): Letters A–Z (65–90), a–z (97–122), digits 0–9 (48–57), and control characters (0–31, like newline=10, tab=9). Characters outside this range return Unicode code points, which may exceed 127
• Space is character 32: If you're debugging and something invisible is causing issues, check for code 32 (regular space), 9 (tab), 10 (newline), or 13 (carriage return)
• Case matters: 'A' = 65, 'a' = 97. The difference between uppercase and lowercase is exactly 32 in ASCII — which is why a bitwise OR with 32 lowercases a character in low-level code

FAQ

What's the ASCII code for Enter/Return? Line feed (LF) is 10. Carriage return (CR) is 13. Windows line endings use both (CR+LF = 13, 10); Unix uses only LF.

How do I convert back from ASCII codes to text? Use the ASCII to Text tool — paste your numeric codes and it reconstructs the original string.

What about characters like é, ñ, or emoji? Those are Unicode characters beyond the 127-character ASCII range. They have Unicode code points (for example, é = 233), which this tool will display correctly.

Related Tools

• ASCII to Text
• Text to Binary