Need to find an ASCII code fast or convert characters to hex and binary? This online ASCII table lets you search the full chart, understand control characters, and convert text in seconds.
How to Use This ASCII Table Effectively
Start by searching with a character (such as "@"), a decimal value (64), a hex value (0x40), or a binary byte. The highlighted row shows decimal, hex, octal, and binary side by side, plus the control-name when relevant. Use category filters to focus on control characters or printable ASCII when you need a clean list. For bulk work, paste multiple characters into the converter to see their codes line by line. When encoding, check the numeric value you need and copy the corresponding symbol back into your editor. Keeping the table open next to logs or protocol docs makes it easy to verify delimiters, whitespace, and escape bytes.
Why Use an Online ASCII Table?
An online ASCII code chart is faster than digging through PDFs or wiki pages. It runs in any browser, works on mobile, and requires no installation, so you can get answers during debugging or study sessions. Because everything runs locally, you can inspect sensitive snippets like tokens, config files, or log lines without uploading them. The table also provides quick context for common pitfalls: why tab is 0x09, why newline is 0x0A, and why uppercase and lowercase letters differ by 32. For students, seeing the codes next to the symbols makes byte values memorable and helps connect theory with real text.
Features Breakdown
- Instant search by character, decimal, hex, or binary without scrolling the full chart.
- Clear separation of control and printable ASCII, including names like BEL, TAB, and ESC.
- Multiple numeric formats displayed together for quick comparison and conversion.
- Batch text converter for turning strings into code values or back into symbols.
- Copy-friendly output for code, documentation, worksheets, and teaching notes.
- Privacy-first processing that stays in your browser with no uploads or tracking.
Common Workflows and Learning Tips
Use the table to validate delimiters in CSV or HTTP headers, decode UART or serial output, and confirm that an API signature uses the expected line breaks. When working with legacy systems, you may encounter control characters like EOT, ACK, or ETX; the chart makes them easy to map. In education, practice converting between letters and numbers, and note that digits start at 48, which explains many ASCII math tricks. Designers using ASCII art can also reference the printable range to avoid invisible characters. Building these habits reduces off-by-one mistakes and encoding surprises.
FAQ
Q: Is ASCII still relevant when Unicode is everywhere?
A: Yes. Unicode is backward compatible with ASCII, and the first 128 Unicode code points are identical to ASCII. Many protocols, file formats, and programming languages still rely on ASCII ranges for control characters and basic text, so knowing ASCII values remains practical.
Q: Why do uppercase and lowercase letters differ by 32?
A: ASCII assigns uppercase A-Z to 65-90 and lowercase a-z to 97-122. The difference is exactly 32 because of a single bit in the binary representation. This design makes case conversion efficient with simple bitwise operations.
Q: What is the difference between ASCII and extended ASCII?
A: Standard ASCII uses 7 bits for 128 characters. "Extended ASCII" is not a single standard; it refers to various 8-bit code pages that add characters 128-255. Those extra values differ by system and locale, which is why Unicode replaced them.