TOOLADEX
light
← Back to Blog

ASCII Table: Complete Reference for All 256 Characters with Quick Converter

By Tooladex Team •
ASCII TableDeveloper ToolsCharacter EncodingReference
ASCII Table: Complete Reference for All 256 Characters with Quick Converter

Ever needed to know what character code 65 represents? Or convert 0x41 to decimal? Or find the HTML entity for the copyright symbol?

The ASCII Table is one of those fundamental references every developer needs — but finding a good one that shows all formats (decimal, hex, octal, binary, HTML entity) in one place can be frustrating.

The Tooladex ASCII Table solves this. It’s a complete, searchable reference for all 256 ASCII and Extended ASCII characters, with a quick converter, filters, and both table and grid views — all running locally in your browser.

🧭 What Is ASCII?

ASCII (American Standard Code for Information Interchange) is a character encoding standard that represents text in computers and other devices.

Originally developed in the 1960s, ASCII uses 7 bits to represent 128 characters (0-127), including:

  • Control characters (0-31, 127) — Non-printable characters for device control
  • Printable ASCII (32-126) — Letters, digits, punctuation, and symbols
  • Extended ASCII (128-255) — Additional characters for special symbols, accented letters, and international characters

Each ASCII character has multiple representations:

  • Decimal (0-255) — The standard numeric representation
  • Hexadecimal (0x00-0xFF) — Base-16, commonly used in memory addresses
  • Octal (000-377) — Base-8 representation
  • Binary (0b00000000-0b11111111) — Base-2, showing the actual bit pattern
  • HTML Entity — The HTML representation (e.g., A for ‘A’)
  • Character — The visual representation itself

💡 Why You Need an ASCII Table

Whether you’re debugging character encoding issues, working with binary data, or building text processing tools, an ASCII table is essential:

Character Encoding
Understanding how characters are represented in different number systems is crucial for working with character encodings, file formats, and data processing.

String Manipulation
Converting between character codes and characters is common in programming. Functions like charCodeAt() and fromCharCode() in JavaScript use ASCII values.

Data Validation
Checking if characters fall within specific ranges (e.g., alphanumeric: 48-57, 65-90, 97-122) is useful for input validation and data cleaning.

HTML Development
HTML entities allow you to display special characters that might conflict with HTML syntax or aren’t easily typed on keyboards.

Debugging
When debugging character-related issues, knowing the exact ASCII value helps identify problems with encoding, special characters, or control characters.

File Processing
Binary file formats often use specific ASCII values as delimiters, markers, or control codes. Understanding these values is crucial for parsing files correctly.

✨ Features of the Tooladex ASCII Table

The Tooladex ASCII Table provides everything you need in one comprehensive tool:

⚡ Quick Converter Widget

Convert any value to all encodings instantly:

  • Enter decimal (65), hex (0x41), octal (0101), binary (0b01000001), character (A), or HTML entity (A)
  • See all representations displayed in a clean grid
  • Copy any value with one click
  • Real-time conversion as you type

Perfect for quick lookups without scrolling through the entire table.

🔍 Enhanced Search

Search recognizes multiple formats:

  • Decimal: 65 → finds character 65 (A)
  • Hexadecimal: 0x41 or 41 → finds character 65
  • Octal: 0101 → finds character 65
  • Binary: 0b01000001 or 01000001 → finds character 65
  • Character: A → finds character 65
  • Description: uppercase → finds all uppercase letters

Also supports partial text matching across all fields.

🎯 Quick Filter Buttons

Filter characters by category with one click:

  • All — Show all 256 characters
  • Control — Control characters (0-31, 127)
  • Printable — Printable ASCII (32-126)
  • Letters — Uppercase and lowercase letters
  • Digits — Numbers 0-9
  • Symbols — Punctuation and special symbols
  • Extended — Extended ASCII (128-255)

Combine filters with search for precise results.

📊 Two View Modes

Table View
Traditional table format showing all columns:

  • Decimal, Hex, Octal, Binary, HTML Entity, Character, Description, Actions

Perfect for detailed reference and copying specific values.

Grid View (16×16)
Traditional ASCII chart layout:

  • Visual 16×16 grid showing all 256 characters
  • Row and column headers with hex notation
  • Decimal, character, and hex displayed in each cell
  • Click any cell to copy its decimal value
  • Filtered characters are dimmed for clarity

Perfect for visual reference and quick character lookup.

📋 Complete Character Information

Every character shows:

  • Decimal — Standard numeric representation
  • Hexadecimal — Base-16 format (0x00-0xFF)
  • Octal — Base-8 format (000-377)
  • Binary — Base-2 format (0b00000000-0b11111111)
  • HTML Entity — HTML representation
  • Character — Visual representation
  • Description — Character name and type

🎨 Color-Coded Categories

Visual organization with color coding:

  • Control Characters (0-31, 127) — Red tint
  • Printable ASCII (32-126) — Standard grey
  • Extended Control (128-159) — Yellow tint
  • Extended ASCII (160-255) — Blue tint

Makes it easy to identify character types at a glance.

📝 Detailed Character Descriptions

Extended ASCII characters (128-255) include proper Unicode names:

  • 169: “Copyright Sign ©”
  • 176: “Degree Sign °”
  • 177: “Plus-Minus Sign ±”
  • 178: “Superscript Two ²”
  • 181: “Micro Sign µ”
  • 188: “Vulgar Fraction One Quarter ¼”
  • And all accented letters (À, Á, Â, etc.)

No more generic “Extended ASCII” labels — every character has a proper name.

🔐 100% Client-Side

All processing happens locally in your browser:

  • No data uploaded to servers
  • No tracking or logging
  • Complete privacy
  • Works offline (after initial page load)

🛠️ How to Use the ASCII Table

Quick Conversion

  1. Enter a value in the converter widget (decimal, hex, octal, binary, character, or HTML entity)
  2. See all encodings displayed instantly
  3. Copy any value with one click

Example: Enter 65 and see it’s 0x41 in hex, 0101 in octal, 0b01000001 in binary, A as HTML entity, and the character A.

Search for Characters

  1. Type in the search box — supports multiple formats
  2. See filtered results instantly
  3. Click any result to copy values

Example: Search copyright to find the copyright symbol (©) at decimal 169.

Filter by Category

  1. Click a filter button (Control, Printable, Letters, etc.)
  2. See only matching characters
  3. Combine with search for precise results

Example: Click “Letters” to see only A-Z and a-z, then search “uppercase” to see only A-Z.

Use Grid View

  1. Switch to Grid view using the toggle
  2. Browse the 16×16 chart
  3. Click any cell to copy its decimal value
  4. Hover for details — see full character information

Perfect for visual reference and quick lookups.

📘 Common Use Cases

Character Encoding Debugging

When debugging character encoding issues:

  1. Use the converter to find the decimal value of a problematic character
  2. Check all representations to understand how it’s encoded
  3. Verify HTML entities for web development

String Validation

When building input validation:

  1. Filter to “Letters” or “Digits” to see valid character ranges
  2. Use the converter to check specific character codes
  3. Copy decimal ranges for your validation logic

HTML Entity Lookup

When working with HTML:

  1. Search for the character you need (e.g., “copyright”)
  2. Copy the HTML entity directly
  3. Use in your HTML code

Binary Data Processing

When parsing binary files:

  1. Use the grid view to see character codes visually
  2. Convert hex values to characters
  3. Identify control characters and delimiters

Learning Character Encoding

When learning about character encoding:

  1. Browse the table to see all representations
  2. Use filters to understand character categories
  3. Experiment with the converter to see relationships between formats

🎓 Understanding ASCII Character Sets

Control Characters (0-31, 127)

Non-printable characters used for device control and formatting:

  • NUL (0) — Null character, used as string terminator in C
  • HT (9) — Horizontal tab
  • LF (10) — Line feed (newline)
  • CR (13) — Carriage return
  • ESC (27) — Escape character
  • DEL (127) — Delete character

Printable ASCII (32-126)

Standard printable characters:

  • Space (32) — The space character
  • Punctuation (33-47, 58-64, 91-96, 123-126) — Various punctuation marks
  • Digits (48-57) — Numbers 0-9
  • Uppercase Letters (65-90) — A-Z
  • Lowercase Letters (97-122) — a-z

Extended ASCII (128-255)

Additional characters for special symbols and international characters:

  • Extended Control (128-159) — Additional control characters (varies by encoding)
  • Extended ASCII (160-255) — Special symbols, accented letters, and international characters

Common examples:

  • 169 — Copyright Sign ©
  • 176 — Degree Sign °
  • 177 — Plus-Minus Sign ±
  • 181 — Micro Sign µ
  • 188 — Vulgar Fraction One Quarter ¼
  • 192-255 — Accented letters (À, Á, Â, etc.)

💡 Tips for Using the ASCII Table

Quick Lookups

  • Use the converter for single character lookups — faster than scrolling
  • Use search when you know the character or description
  • Use filters to narrow down to specific character types

Working with Multiple Formats

  • Copy decimal for most programming languages
  • Copy hex for memory addresses and binary data
  • Copy HTML entity for web development
  • Copy character for direct use in strings

Learning Character Encoding

  • Browse the grid view to see the visual layout
  • Use filters to understand character categories
  • Experiment with the converter to see relationships between formats
  • Read descriptions to learn character names

Debugging

  • Search for problematic characters to find their codes
  • Use the converter to verify character representations
  • Check HTML entities for web-related issues
  • Identify control characters that might cause issues

🔒 Privacy & Security

All ASCII table operations happen locally in your browser:

  • No data uploaded to servers
  • No server-side processing
  • No tracking or analytics
  • Complete privacy
  • Works offline (after initial page load)

Your searches, conversions, and character lookups stay exactly where they belong: with you.

🚀 Try the Tooladex ASCII Table

The Tooladex ASCII Table helps you:

  • ✔ View all 256 ASCII and Extended ASCII characters
  • ✔ Convert between decimal, hex, octal, binary, HTML entity, and character formats
  • ✔ Search by any format or description
  • ✔ Filter by character category (Control, Printable, Letters, etc.)
  • ✔ Switch between table and grid views
  • ✔ See detailed character descriptions with proper Unicode names
  • ✔ Copy any value with one click
  • ✔ Keep your data private (100% client-side processing)

Whether you’re debugging character encoding, building text processing tools, learning about character encoding, or just need a quick reference — this tool gives you everything you need in one place.

Character encoding becomes character understanding.

Try it now — browse the complete ASCII table, convert values instantly, and find exactly what you need.

ASCII Table

View the complete ASCII character table with decimal, hexadecimal, octal, binary, HTML entity, and character representations for all 256 ASCII/Extended ASCII characters. Perfect for developers and programmers.

Try Tool Now