# ASCII Table Reference Browse the complete ASCII character table (0–127) with decimal, hex, octal, binary, HTML entity, and control character names; filter by code or name > Canonical page: https://elysiatools.com/en/tools/ascii-table - **Category:** Development - **Keywords:** ascii, table, reference, character, control characters, code page, charset, ascii table ## Overview The ASCII Table Reference is an interactive lookup tool for the complete 7-bit ASCII character set (0–127). It provides instant access to decimal, hexadecimal, octal, binary, HTML entities, and control character representations, with built-in filtering and highlighting options to streamline development and debugging workflows. ## Inputs - **Show Control Characters (0–31, 127)** (checkbox) - **Show Printable Characters (32–126)** (checkbox) - **Letter Case Filter** (select) - **Highlight Range** (select) ## When to use - When debugging low-level network protocols or serial communications where you need to map raw bytes to ASCII control characters. - When writing HTML or web content and you need to find the correct HTML entity or decimal code for special symbols. - When programming character validation logic and you need to verify the exact decimal or hex boundaries for uppercase, lowercase, or numeric ranges. ## How it works - Toggle the visibility of control characters (0–31, 127) or printable characters (32–126) to narrow down the displayed set. - Apply a letter case filter to isolate uppercase letters, lowercase letters, digits, or punctuation and symbols. - Select a highlight range to visually emphasize specific character groups like letters, digits, or control codes in the table. - Read the corresponding decimal, hexadecimal, octal, binary, and HTML entity values directly from the generated interactive table. ## Use cases - Finding the hexadecimal representation of control characters like Line Feed (LF) or Carriage Return (CR) for parser configuration. - Looking up HTML entity codes for symbols and punctuation to prevent rendering issues in web browsers. - Verifying binary and octal values of characters when writing low-level bitwise operations or embedded systems code. ## Frequently asked questions ### What is the range of characters covered by this ASCII table? The table covers the standard 7-bit ASCII range from 0 to 127, including both control and printable characters. ### Can I filter the table to show only numbers or letters? Yes, you can use the Letter Case Filter to display only digits, uppercase letters, lowercase letters, or punctuation. ### Does this tool support extended ASCII characters above 127? No, this reference tool is strictly for the standard 7-bit ASCII character set (codes 0–127). ### How do I find the HTML entity for a specific character? Locate the character in the table to view its corresponding HTML entity representation in the dedicated column. ### Can I hide control characters like NUL, LF, or CR? 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