String to ASCII Codes
Convert every character of a string to its ASCII code value instantly — get space-separated decimal codes. Free, client-side ASCII code converter.
🔒 100% Client-Side Processing
Your data is processed entirely in your browser and never transmitted to any server.
0 / 100M Limit
Common Use Cases
Debugging invisible characters
Reveal the numeric codes in a string to find the zero-width spaces and odd Unicode breaking your comparisons.
Embedded systems payloads
Get the decimal byte values of a command string for serial protocols and microcontroller code.
Frequently Asked Questions
- What does the output represent?
- Each character's decimal code value, space-separated — "Hi" becomes 72 105. For standard English text these are classic ASCII codes (0–127); other characters show their Unicode code point.
- Where are ASCII codes used?
- Embedded systems and serial protocols, keyboard event handling, legacy file formats, and teaching how text maps to numbers. The companion ASCII-to-String tool reverses the conversion.
- How do I convert a string to ASCII codes in Python?
- ord(c) for c in "Hi" gives [72, 105] — one call per character. Paste text here first to see the expected output before writing the loop.
- Is my data private when I use this tool?
- Yes. This tool runs entirely in your browser using client-side JavaScript — nothing you type is transmitted to, logged by, or stored on any server. You can safely process confidential text, tokens, or code.