ASCII Converter
Convert text to ASCII codes and ASCII codes back to text.
Runs entirely in your browser.
Your data never leaves this device and is never sent to our servers.
Result
ASCII assigns a number from 0 to 127 to each basic character. Knowing that A is 65 and a is 97 explains a surprising amount — why case conversion is a bit flip, why sorting puts uppercase first, and why control characters lurk below 32.
How to use it
- Enter text or a list of numeric codes.
- Choose the direction and separator.
- Copy the output.
Not working as you expect? Report a problem with this tool.
Frequently asked questions
What is the difference between ASCII and UTF-8?
UTF-8 is a superset. The first 128 code points are identical to ASCII, which is why ASCII text is already valid UTF-8.
Why is my code rejected?
Values above 255 are outside the single-byte range this tool converts. Use the Binary Translator for multi-byte UTF-8.