Free Online Tool

ASCII Converter

Convert text to ASCII codes and vice versa.

How to Use Examples Related Tools

ASCII Converter

Convert between text and ASCII values in multiple number formats

Direction

Number Format

Separator

Text Input

Characters: 0Bytes: 0

ASCII Output

decimal format

Character encoding

Example Texts

Click any example to load it

Hello World!

Basic text

ASCII

Uppercase letters

123!@#

Numbers and symbols

A→Z

With special character

72 101 108 108 111

Decimal ASCII (for decode)

0x48 0x65 0x6C 0x6C 0x6F

Hex ASCII (for decode)

How to Use ASCII Converter

Type or paste your text into the input box.
Each character is converted to its ASCII/Unicode code point. Decimal is the default; hexadecimal (0x), octal (0o), and binary (0b) are also available.
Codes appear space-separated in the output — decode mode turns codes back into text.
Use Copy to grab the result. Everything runs in your browser.

ASCII covers the first 128 code points (0–127); characters beyond that use their Unicode code point. Letters, digits, punctuation, and spaces each map to a distinct number.

Examples

Text to decimal — input:

Output:

72 105

Two letters — input:

Output:

65 66

Hexadecimal format — input:

Output:

0x48 0x69

In hex mode each byte is shown with a 0x prefix, padded to two digits.

Features

Privacy Focused

All processing happens in your browser. No data is sent to servers.

Free Forever

No registration, no limits, completely free to use.