Free Number Base Converter — Binary, Octal, Decimal, Hexadecimal
Convert numbers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Edit any field and all others update instantly.
Key Features
- Live conversion — edit any field to update all others
- Binary, octal, decimal, hex supported
- Input validation with helpful error messages
- Shows bit count, even/odd, and power-of-2 info
SimplyUtils vs Competitors
| Feature | SimplyUtils | RapidTables | Binaryhexconverter | ConvertBinary |
|---|
| Live all-at-once conversion | ✓ | ✗ | ✗ | ✗ |
| Input validation | ✓ | ✓ | ✓ | ✓ |
| Extra bit info | ✓ | ✗ | ✗ | ✗ |
| Free & no ads blocking | ✓ | ✗ | ✗ | ✗ |
Frequently Asked Questions
What is hexadecimal used for?
Hex (base 16) is commonly used in programming for memory addresses, color codes (#FF5733), and byte values because it maps cleanly to binary (4 bits = 1 hex digit).
How do I read binary?
Binary is base 2, using only 0 and 1. Each position from right to left represents a power of 2: 1, 2, 4, 8, 16... So 1010 in binary = 8+2 = 10 in decimal.