ASCII Code Converter — Text to ASCII & ASCII to Text
Convert any text to ASCII decimal, hexadecimal, and binary codes instantly. Paste ASCII codes to decode them back to readable text. All processing runs in your browser.
Developer & Verifier
Developed by
Marcus Rodriguez
Full-stack developer specializing in web font implementation and performance optimization
Verified by
Sarah Mitchell
Typography expert specializing in font design, web typography, and accessibility
What is ASCII?
ASCII (American Standard Code for Information Interchange) is a character encoding standard that maps 128 characters to numeric codes. Developed in the 1960s, ASCII assigns a unique number to each character: uppercase letters A–Z occupy codes 65–90, lowercase a–z occupy 97–122, digits 0–9 occupy 48–57, and common punctuation fills the remaining printable range (32–126). Control characters (0–31 and 127) handle non-printable functions like tab, newline, and backspace.
ASCII remains the foundation of modern text encoding. Unicode — which covers over 149,000 characters across every writing system — uses ASCII as its first 128 code points, making ASCII a universal subset. Understanding ASCII codes is essential for programming, data processing, and debugging character encoding issues.
This converter supports bidirectional conversion: enter text to see its ASCII codes in decimal, hexadecimal, and binary formats, or enter ASCII codes (decimal or hex) to decode them back to readable text. The built-in reference table covers all 95 printable characters.
Features
Key Benefits
Why choose this tool for your document conversion needs
Bidirectional Conversion
Convert text to ASCII codes and ASCII codes back to text in a single tool.
Multiple Formats
View codes in decimal, hexadecimal, and binary simultaneously.
ASCII Reference Table
Built-in table of all 95 printable ASCII characters with their code values.
100% Browser-Based
All conversion runs locally. No data sent to any server.
Tool Statistics
Character Set
ASCII defines 128 characters: 95 printable and 33 control characters.
Output Formats
Decimal, hexadecimal, and binary output for every character.
Processing
All conversion happens in your browser instantly.
Best Practices
Tips for getting the most out of this tool
Know the Printable Range
ASCII codes 32-126 are printable characters. Codes 0-31 and 127 are control characters not meant for display.
💡 Tip: Space (32) is the first printable character, tilde (126) is the last.
Use Hex for Programming
Hexadecimal is the most common format in programming (0x41 for A, 0x61 for a).
💡 Tip: Hex values are shorter and widely used in CSS, HTML entities, and debugging.
Remember Key Values
A=65, a=97, 0=48. All uppercase letters are 65-90, lowercase 97-122, digits 48-57.
💡 Tip: The difference between upper and lowercase is always 32.
Troubleshooting Guide
Common issues and how to resolve them
Non-ASCII characters show as empty or question marks
Standard ASCII only covers codes 0-127. Characters like accented letters, emoji, or non-Latin scripts are outside ASCII range. The tool will flag these as non-ASCII.
Pasted text includes invisible characters
Some copied text includes hidden formatting or zero-width characters. Use the ASCII output to identify unexpected codes, then clean the input text.
Copy button not working
Try selecting the output manually and using Ctrl+C (Windows) or Cmd+C (Mac). Some browsers require clipboard permissions.
Frequently Asked Questions
What is ASCII?
How do I convert text to ASCII codes?
What is the ASCII value of A?
What is the difference between ASCII and Unicode?
Which ASCII characters are printable?
Can I convert ASCII codes back to text?
Is this tool free to use?
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