Binary Converter
Convert between binary, hex, decimal, and octal in one place. Free number-base converter — private and instant.
Binary
11111111
Octal
377
Decimal
255
Hex
FF
Binary, hex, decimal & octal explained
Binary uses digits 0 and 1 — the language of digital hardware. Hexadecimal packs four bits into one digit (0–F), which is why developers prefer it for memory dumps. Decimal is everyday base 10. Octal groups bits by threes and still appears in Unix permissions.
Need text instead of numbers? Use the text to binary or binary to text translators. For floating-point layouts, open the IEEE 754 calculator.
Quick conversion table
| Decimal | Binary | Hex | Octal |
|---|---|---|---|
| 0 | 00000000 | 00 | 0 |
| 1 | 00000001 | 01 | 1 |
| 10 | 00001010 | 0A | 12 |
| 15 | 00001111 | 0F | 17 |
| 255 | 11111111 | FF | 377 |
Frequently Asked Questions
What does a binary converter do?
It converts numbers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Useful for programming, networking, and debugging.
How do I convert hex to binary?
Enter a hex value (e.g. FF), select Hex as the input base, and read the Binary row. FF₁₆ = 11111111₂ = 255₁₀.
Is this binary converter free?
Yes — free, no signup, and all math runs locally in your browser.
Binary converter vs binary translator — what is the difference?
A binary converter usually means number-base conversion. A binary translator often means text ↔ binary. We offer both: this page for bases, plus dedicated text tools.