Binary/Decimal Converter-- Convert Base 2 and Base 10
Convert between binary and decimal numbers instantly.
Binary/Decimal Converter Tool
Why Use Our Binary Converter?
BigInt Support
Handle arbitrarily large numbers.
Instant Results
Real-time conversion in browser.
100% Secure
No data leaves your device.
Bidirectional
Convert both ways with swap.
One-Click Copy
Copy results instantly.
Free Forever
No signup, no limits.
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Binary Number System Guide
Binary (base-2) is the foundation of all digital computing. Every piece of data in a computer -- text, images, programs -- is ultimately stored as sequences of 0s and 1s. Each digit is called a "bit" (binary digit), and 8 bits make a "byte".
Understanding binary is essential for low-level programming, networking (subnet masks), file permissions (chmod), and computer science fundamentals.