Examples
About Number Systems
Different number bases are used in computing. Binary (base-2) is fundamental to digital systems. Hexadecimal (base-16) is commonly used for memory addresses and colors.
How to Convert Number Bases Online
- 1
Enter your number
Type or paste a number into any of the four input fields: binary, octal, decimal, or hexadecimal. The converter auto-detects invalid characters for the chosen base and highlights errors immediately. - 2
View instant conversions
As you type, all other base fields update in real time. You see the equivalent binary, octal, decimal, and hexadecimal values simultaneously without pressing any button. - 3
Copy the result
Click the copy icon next to any output field to copy the converted value to your clipboard. Use it directly in your code, documentation, or debugging session. - 4
Try example values
Use the built-in examples to see how common values like 255, 1024, or 0xFF look across all four number systems. This is helpful for learning how base conversion works.
Common Use Cases
CSS and Web Colors
Unix File Permissions
Debugging and Low-Level Programming
Networking and Subnetting
Why Use a Number Base Converter?
A number base converter translates values between the four most widely used numeral systems in computing: binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Every digital system stores data in binary, but humans find decimal natural and engineers prefer hexadecimal for its compactness. This tool bridges the gap by converting any value across all four bases in real time, with instant validation and zero server-side processing.
Whether you are debugging a memory dump, configuring regular expressions with hex character codes, encoding data with the Base64 Encoder, or inspecting CSS color values, understanding number bases is fundamental. This converter handles integers of arbitrary size and gives you all four representations side by side so you can copy the exact format your code or tool requires.
For developers who frequently work with encoded data, the number base converter pairs well with the URL Encoder/Decoder for percent-encoded hex values and the Image to Base64 tool when inspecting binary payloads. Bookmark this page to save time every time you need a quick binary-to-hex or decimal-to-octal conversion.
How It Compares
Most online base converters handle only two bases at a time, forcing you to run multiple conversions. FindUtils shows all four bases simultaneously as you type, eliminating extra steps. Unlike downloadable calculator apps, this tool runs entirely in your browser with no installation, no sign-up, and no data sent to any server. It also validates input characters in real time, so you never accidentally paste a letter into a binary field and wonder why the result looks wrong.
Compared to using programming REPLs or command-line tools like printf or Python's int() and hex(), the visual side-by-side layout makes it easier to compare representations at a glance. For related developer conversions, check the Unix Timestamp Converter or the Scientific Calculator for arithmetic in different bases.