ASCII Converter

What ASCII Converter does

Convert text to decimal, hexadecimal or binary character codes and convert supported code values back to text.

Worked example

How it works

Each supported character is mapped to its numeric code value and rendered in the selected base. Reverse mode parses the entered values and converts valid codes back to characters.

Developer workflows

• Inspect protocol and file-format bytes
• Teach character encoding basics
• Prepare numeric character values for tests

Security and compatibility checks

• Standard ASCII covers only values 0–127.
• Non-ASCII text requires a Unicode-compatible encoding.
• Binary and hexadecimal input needs unambiguous separators.

Frequently asked questions

Is ASCII the same as Unicode?

ASCII is a 128-character subset represented by the same initial code points in Unicode.

Why can’t ASCII represent an emoji?

Emoji are Unicode characters outside the limited ASCII range.