Ascii converter
About the ASCII Converter
The ASCII Converter shows the decimal, hexadecimal, octal and binary values of each character in a string. It is useful for protocol debugging and learning how characters are encoded.
How to use it
- Paste your text.
- The output shows each character alongside its code points.
- Copy the table.
Every character in a string is stored inside a computer as a number. The ASCII Converter takes any text you paste and shows how each character is encoded in the four most common notations — decimal, hexadecimal, octal and binary — so you can see exactly what value sits behind each letter, digit or symbol.
It is a focused teaching and debugging tool: it does not need to know what the text means, only that every character maps to a defined code point. The table updates instantly as you type, which makes it especially useful when you are trying to understand or verify how a particular byte was produced.
How to Use the ASCII Converter
- Paste or type your text into the input.
- Read the generated table, one row per character.
- Find the decimal, hex, octal and binary columns you need and copy them.
Practical Use Cases
Learn how the letter, space and digit characters you use every day are stored as bytes, debug a protocol or serial log where you need to confirm what a byte really holds, and build test fixtures that call out an exact character code. It also helps explain why two strings that look identical can actually differ at the byte level.
A Note on Non-ASCII
The table focuses on standard ASCII code points. Characters outside that range render as their multibyte representation rather than a single ASCII value, which is correct behaviour when working with modern Unicode text.
ASCII conversion — common questions
Why does each character have several values?
Because the same number can be written in different bases: decimal (base 10), hexadecimal (base 16), octal (base 8) and binary (base 2) are all valid ways to express the one stored value, and each notation suits a different debugging context.
What does the decimal column represent?
It is the numeric code point of the character in base 10 — the value the computer stores for that character. Uppercase A, for example, is 65.
Is my text sent anywhere?
No. The conversion happens locally in your browser. Your pasted text never leaves your device, so it is safe to inspect even sensitive strings.
Similar tools
Convert text to binary and the other way for any string input.
Convert text to hexadecimal and the other way for any string input.
Convert text to decimal and the other way for any string input.
Popular tools
Easily convert Days time units to Months with this easy convertor.
Compress and optimize images for a smaller image size but still high quality.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Count the amount of characters and words of a given text.
Generate passwords with custom length and custom settings.
Check if the URL is banned and marked as safe/unsafe by Google.