Number Base Converter
FreeConvert numbers between binary, octal, decimal and hexadecimal bases
Options
About Number Base Converter
Numbers can wear many outfits, the same value looks completely different in binary, octal, decimal, or hexadecimal. Programmers, students, and electronics hobbyists constantly need to jump between these bases, whether reading a memory address in hex or working out a binary flag. This tool converts a number across binary, octal, decimal, and hexadecimal at once.
Type a value in any base and instantly see its equivalents in the others, ready to copy. It works in your browser with no signup and no watermark, and your numbers are never sent anywhere. Skip the manual arithmetic and error-prone mental math: this is a fast, free way to translate between bases whenever your code, homework, or hardware demands it.
Common uses
- Converting a hexadecimal color or memory address into decimal to understand its value
- Turning a decimal number into binary to set or read individual bit flags
- Checking the octal equivalent of a file permission value in decimal
- Helping with computer science homework that requires base conversions
- Translating a binary sensor reading into a readable decimal number
How to use
- 1
Configure options
Set your preferences using the options panel below.
- 2
Click Generate
Click the process button to generate your result instantly.
- 3
Copy or download
Copy the result to clipboard or download it directly to your device.
Why ToolHub?
- 100% Free — no account needed
- Works in your browser — no software required
- Instant results
- Secure and private
- No data stored
- Simple to use
FAQ
Which bases can I convert between?
It handles binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16), showing all equivalents at once.
Can it handle large numbers?
Yes, it converts large whole numbers across bases accurately without you needing to do any manual calculation.
Does it work with negative numbers or decimals?
It is designed for whole-number base conversion. For fractional or signed binary representations you may need a specialized tool.
Can I use Number Base Converter on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.