ASCII Converter
Convert between ASCII and Text, Hex, Binary, Decimal, Base64, Octal, and String formats. All conversions run locally in your browser.
100% Client-Side Processing
Your data is processed entirely in your browser. No data is sent to any server.
Table of Contents
What is ASCII?
ASCII (American Standard Code for Information Interchange) is a character encoding standard that represents text as numbers. Classic ASCII uses values 0–127, and many tools also use 0–255 ("extended" ranges) depending on context.
This converter helps you switch between the character view (text) and numeric/encoded views (decimal, hex, binary, octal, Base64).
How the Converter Works
All conversions run locally in your browser. Nothing is uploaded or stored.
- Select formats: Choose a From and To format.
- Paste input: Enter text, numbers, or encoded values.
- Instant output: The output updates automatically as you type.
- Swap: Flip the conversion direction with one click.
Supported Formats & Examples
Text Ascii
Example: Hello ↔ 72 101 108 108 111
Text ↔ ASCII (decimal codes)
Text To Formats
Example (A): hex 41, binary 01000001, octal 101, decimal 65
ASCII (text) ↔ Hex / Binary / Octal / Decimal
Base64
Example: Hello ↔ SGVsbG8=
ASCII ↔ Base64
Common Use Cases
Need a full reference? Use our ASCII Table to browse all characters with decimal, hex, octal, and binary values.