About ASCII Code Table
ASCII (American Standard Code for Information Interchange) is a foundational 7-bit character encoding standard that represents 128 characters for text and control flows.
Key Features
- Full coverage of standard ASCII 0-127, including control and printable characters
- Cross-reference for decimal, hex, octal, binary, and HTML entities
- Category filters and keyword search for fast targeting
- Quick lookup by radix value with auto highlight
- Extended 128-255 reference for encoding troubleshooting
How to Use
- Enter a character, code value, or keyword in search
- Use category filters to narrow down rows
- Use Quick Lookup with any radix value to jump to the target row
- Copy character or HTML entity for code and documentation
Common Use Cases
- Character encoding and escaping troubleshooting
- Protocol, serial data, and log debugging
- HTML entity and special character handling in frontend work
- Teaching and learning ASCII fundamentals
FAQ
Why are control characters not printable
Control characters are used for control operations in data streams, not visible glyph output, so the table shows abbreviations.
Is extended ASCII identical on all systems
Not exactly. Different code pages vary. This tool shows a common Windows-1252 reference set.
Will my data be uploaded
No. All lookup and filtering logic runs locally in your browser.