- Select the conversion type (ASCII, Unicode, Hex, Binary, or HTML)
- Choose the direction: Encode (text to codes) or Decode (codes to text)
- Enter your text or codes in the input area
- The result appears instantly as you type
- Use the Swap button to quickly reverse the conversion
What is the difference between ASCII and Unicode?
ASCII is a 7-bit encoding that represents 128 characters (0-127), including English letters, digits, and basic symbols. Unicode is a universal standard that can represent over 140,000 characters from all writing systems worldwide, including emojis and special symbols.
What format does Unicode output use?
Unicode output uses the standard U+XXXX format, where XXXX is the hexadecimal code point. For example, the letter A is U+0041, and the emoji 🌍 is U+1F30D. This format is widely used in documentation and programming.
How do I convert emoji to Unicode?
Simply paste the emoji in the input field with Text to Unicode selected. The tool will show the Unicode code point. For example, 🌍 converts to U+1F30D. You can also decode U+1F30D back to the emoji.
What are HTML entities used for?
HTML numeric entities (like A for A) are used to display special characters in HTML that might otherwise be interpreted as code. They ensure characters display correctly regardless of the pages encoding.
Text Encoding Complete Guide: HTML Entities, ASCII, Unicode, and Character Encoding
Deep dive into text encoding principles including HTML entity encoding, ASCII, Unicode, UTF-8, with code implementations in multiple programming languages.
Number Base Conversion: Complete Guide to Binary, Octal, Decimal, and Hexadecimal
Master the principles and methods of number base conversion. Learn binary, octal, decimal, and hexadecimal conversions with code implementations in multiple programming languages.
Character Encoding Deep Dive [2026] - ASCII, Unicode & UTF-8
A comprehensive guide to character encoding evolution and principles. Master ASCII, Unicode, UTF-8 mechanisms, HTML entity encoding, and binary conversion techniques.
ASCII
ASCII (American Standard Code for Information Interchange) is a character encoding standard that assigns numeric values to 128 characters including English letters, digits, punctuation marks, and control characters. It forms the foundation of modern text encoding systems.
Unicode
Unicode is a universal character encoding standard that assigns a unique number (code point) to every character from every writing system in the world. It aims to represent all characters used in human communication, including letters, symbols, and emojis.