ASCII / Unicode Tool

ASCII Calculator & Converter

Convert text to ASCII codes, hexadecimal, binary, and Unicode code points. Use the ASCII translator to decode hex, inspect UTF-8 bytes, and explore the full ASCII code table.

📝 Text → ASCII
🔢 ASCII → Text
0x Hex → Text
🔎 Char Inspector
📋 ASCII Table

Text to ASCII / Hex / Binary

ASCII Codes / Decimal / Hex → Text

Hexadecimal Reader — Decode Hex to Text

Character Inspector

Character
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ASCII Dec
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Hexadecimal
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Binary
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Octal
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Unicode Code Point
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HTML Entity (Dec)
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HTML Entity (Hex)
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UTF-8 Bytes
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JS charCode
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CSS Escape
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Category
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Full ASCII Code Table (0–127)

Click any character to inspect it in the Character Inspector.

ASCII Calculator — Convert Text to ASCII Codes Online

The ASCII calculator is a multi-mode text encoding converter that lets you instantly translate between human-readable text and its machine-level representations: ASCII decimal codes, hexadecimal (hex), binary, octal, and Unicode code points. Use it as an ASCII translator, a hexadecimal reader, or a character-level UTF-8 byte inspector.

What is ASCII?

ASCII (American Standard Code for Information Interchange) is a 7-bit character encoding standard originally published in 1963. It maps 128 characters — including the 26 upper- and lowercase English letters, digits 0-9, punctuation, and 33 non-printable control characters — to integers 0–127. For example, the letter 'A' has ASCII code 65 (hex: 41, binary: 01000001).

Converting Text to Hexadecimal

Each ASCII character corresponds to a single byte (0x00–0x7F). Non-ASCII Unicode characters may require 2, 3, or 4 bytes in UTF-8 encoding. Our hexadecimal reader mode displays both the raw hex byte sequence and the corresponding character, making it easy to debug byte streams, network packets, and file headers.

Common Conversions

Complete Guide to ASCII, Hexadecimal & Character Encoding

This ascii calculator and char to ascii converter allows developers and students to seamlessly inspect character codes across multiple numeric bases. Easily convert letter to ascii in real-time, whether you need an ascii code table binary reference, want to check the ascii value of character entries, or translate ascii code to english.

Character Codes in JavaScript and Web Development

In web scripting, determining a javascript character code or javascript ascii code is commonly done using String.charCodeAt() and String.fromCharCode(). When preventing XSS vulnerabilities, sanitizing characters using js escapehtml routines helps convert dangerous markup into safe entities.

UTF-8 and Unicode String Conversions

Beyond traditional 7-bit ASCII, our tool helps analyze the modern utf format and multi-byte utf char sequences. You can easily convert unicode to string or evaluate high-order Unicode code points alongside standard Latin characters.

Hexadecimal Utilities: From Text to IP Address

Programmers frequently need to convert words to hex or perform reverse operations (like hex 转 字符 串 or hex to text). For network engineers, converting octets between decimal and hex (such as an ip address converter hex) or evaluating specific hex offsets like 3f hex to decimal (which equals 63 in base-10) is made effortless with our modular char converter and html to ascii entity mapper.

Frequently Asked Questions

An ASCII calculator converts characters to their ASCII decimal numeric values and vice versa. Every printable character has a specific ASCII code between 32 and 126. This tool also handles Unicode code points beyond the standard 128-character ASCII table.
Switch to the "Hex → Text" panel and paste your hexadecimal string (e.g. "48 65 6C 6C 6F"). The tool interprets each hex byte as its ASCII or UTF-8 character. Spaces between bytes are optional.
ASCII defines only 128 characters. Unicode extends this to over 1.1 million code points, covering virtually every writing system. UTF-8 is a variable-width encoding that is backward-compatible with ASCII for the first 128 characters.
Yes. The Character Inspector panel accepts any Unicode character including emojis (e.g. 😀) and shows its full Unicode code point (U+1F600), UTF-8 byte sequence (F0 9F 98 80), and other representations.
Converting a byte value (0–255) to ASCII means looking up the character that byte represents in the ASCII standard. For example, byte 72 = character "H", byte 101 = "e". This is the basis of all text-in-memory storage in computers.