ASCII Converter – Text, Binary & ASCII Code Lookup
Convert text to ASCII codes in decimal, hex, binary, or octal. Explore printable ASCII values and copy results instantly.
What Is ASCII?
ASCII is an early character encoding standard mapping 128 symbols to decimal values 0 through 127.
Modern systems often use UTF-8, which is ASCII-compatible for basic English letters and digits.
How to use this ascii converter tool
- Type or paste text in the input area.
- Select output format: decimal, hexadecimal, binary, or octal.
- Choose a separator (space, comma, newline, none, or custom).
- Enable Live mode for automatic updates, or click Convert when Live mode is off.
- Copy or download the code list, or upload a small text file to convert.
How to Use This Tool
- Enter text to see per-character codes.
- Switch between decimal, hex, binary, and octal output.
- Adjust separators for CSV-style or spaced lists.
- Copy or download results; optional text file import.
ASCII Character Set
- Control characters (0–31) — non-printable (newline, tab, etc.).
- Printable characters (32–126) — space through tilde.
- DEL (127) — delete control code.
ASCII Table (sample)
Common printable characters and decimal codes:
| Character | Decimal code |
|---|---|
| A | 65 |
| B | 66 |
| a | 97 |
| 0 | 48 |
| Space | 32 |
| ! | 33 |
ASCII vs Unicode
- ASCII — 128 codes, English-focused.
- Unicode — global repertoire (100,000+ characters).
- UTF-8 — variable-length encoding; English still one byte like ASCII.
Text to ASCII Examples
| Text | Decimal codes |
|---|---|
| A | 65 |
| Hi | 72 105 |
| Hello | 72 101 108 108 111 |
Conversion Formula
For each character in basic ASCII (U+0000–U+007F):
- Code point = Unicode value (same number as ASCII for 0–127).
- Decimal = code point; hex = hex(code point); binary = 8-bit padded binary.
ASCII to Text Examples
Decode decimal codes back to characters (conceptual):
| Decimal codes | Text |
|---|---|
| 72 101 108 108 111 | Hello |
| 65 | A |
| 49 50 51 | 123 |
ASCII in Programming
- charCodeAt / ord in scripting languages.
- Serial protocols and legacy log files.
- HTTP headers and SMTP (7-bit safe subsets).
ascii converter — frequently asked questions
ASCII (American Standard Code for Information Interchange) assigns numbers 0–127 to control codes, English letters, digits, and punctuation.
Enter text, pick decimal (or hex/binary/octal), and read the code for each character in order.
Uppercase A is decimal 65, hex 41, binary 01000001.
This page focuses on text-to-code output. Use Unicode Converter for mixed notations, or Binary to Text for raw bit strings.
ASCII is a small English-centric set. Unicode includes all scripts; UTF-8 encodes Unicode and matches ASCII for basic English.
Emoji need Unicode code points beyond 127; use the Unicode Converter for full emoji support.
Yes — use Open text file to load content into the input (processed locally).
Yes.
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