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ASCII Table Reference

Searchable reference for all 128 ASCII characters with decimal, hex, octal, binary values, HTML entities, and descriptions. Filter by category and search by name, character, or code. Runs entirely in your browser.

ascii reference encoding characters binary hex

Published May 29, 2026

All interactive tools run entirely in your browser. Your data never leaves your device.

How It Works

Browse all 128 ASCII characters with their decimal, hexadecimal, octal, and binary representations. Search by name, character, decimal, or hex value. Filter by category: control characters, whitespace, digits, uppercase letters, lowercase letters, or symbols. Click any character to expand detailed information including HTML entity, CSS escape, and JavaScript escape codes.

Features

  • 128 ASCII characters: complete standard ASCII table (0-127)
  • Multiple formats: decimal, hex (0x), octal (0), and binary representations
  • 7 categories: Control, Whitespace, Digits, Uppercase, Lowercase, Symbols
  • Full-text search: find characters by name, code value, description, or character
  • Expandable details: binary, HTML entity, CSS escape, JS escape, description
  • Color-coded categories: visual distinction between character types
  • Developer descriptions: every character includes programming context and common uses
  • Click-to-expand: compact table with detailed view on demand

Use Cases

  • Looking up ASCII codes for specific characters
  • Finding HTML entities for special characters
  • Converting between decimal, hex, octal, and binary representations
  • Understanding control characters and their programming uses
  • Quick reference while working with character encoding