Number Base Converter
InternetAiTools.com · Decimal · Binary · Hexadecimal · Octal
💻 Enter Any Number — All Bases Update Instantly
Decimal
Base 10
Binary
Base 2
Hexadecimal
Base 16
Octal
Base 8
Binary Bit Visualization
Enter a number above
⚡ Quick Examples — Click to load
0
Zero
1
One
8
Byte boundary
16
Hex 10
42
Meaning of life
127
Max signed byte
255
Max byte (0xFF)
1024
1 Kilobyte
65535
0xFFFF
16777215
Max RGB
Number Base Converter is a free online tool that instantly converts any number between Decimal (Base 10), Binary (Base 2), Hexadecimal (Base 16), and Octal (Base 8) — all at once, in real time. Perfect for students, programmers, and engineers working with computer science, digital electronics, or coding. No sign-up needed — just type and convert instantly.
❓ Frequently Asked Questions
What is a number base converter?▼
A number base converter translates a number from one numeral system to another. The most common bases in computing are
Base 2 (Binary), Base 8 (Octal), Base 10 (Decimal), and Base 16 (Hexadecimal). This tool converts between all four simultaneously as you type.How do I convert decimal to binary?▼
Type your decimal number into the
Decimal field. The binary equivalent appears instantly. For example, decimal 255 converts to binary 11111111. The bit visualization below the inputs shows each individual bit.How do I convert binary to hexadecimal?▼
Enter your binary number (using only
0 and 1 digits) into the Binary field. The hexadecimal result updates instantly. For example, 11111111 equals hex FF. Invalid characters are filtered out automatically.What is hexadecimal used for in programming?▼
Hexadecimal (Base 16) is used for
color codes in web design (e.g. #FF5733), memory addresses, byte values in debugging, and data encoding in HTML, CSS, and low-level systems programming. It represents binary data far more compactly than decimal.What is octal (Base 8) and where is it used?▼
Octal is a Base 8 system using digits
0–7. It is found in Unix/Linux file permissions (e.g. chmod 755), certain assembly languages, and embedded systems. Each octal digit represents exactly 3 binary bits — a compact shorthand for binary values.Is this number base converter free to use?▼
Yes — completely free, no sign-up, no download. All conversions run entirely in your browser with no data sent to any server. Works on both desktop and mobile.
What is the largest number this converter supports?▼
This converter uses JavaScript's native integer handling, safely supporting integers up to
2⁵³ − 1 (approximately 9 quadrillion in decimal). This comfortably covers all 32-bit and 64-bit programming use cases.
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