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All Number Converter

Enter a number in any base — binary, octal, decimal, or hexadecimal — and instantly see all four representations side by side.

Last updated: May 30, 2026

Client-Side Processing
Input Data Stays on Device
Instant Local Execution
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What is All Number Converter?

Computers use four common number bases: - **Binary (base 2):** The fundamental language of computers. Uses only 0 and 1. Eight bits make one byte. - **Octal (base 8):** Uses digits 0–7. Common in Unix file permissions (chmod 755). - **Decimal (base 10):** The everyday number system. Used in most human-facing applications. - **Hexadecimal (base 16):** Uses digits 0–9 and A–F. Compact binary representation used in memory addresses, color codes, and network data.

This all-in-one converter lets you type a number once and see every representation instantly — ideal for learning, debugging, and quick lookups.

How to Use All Number Converter

1

Select the base of your input number from the dropdown (Binary, Octal, Decimal, or Hexadecimal).

2

Type your number in the input field.

3

All four outputs are shown and updated in real time.

4

Click any copy button to copy the result to your clipboard.

Common Use Cases

  • Quick cross-base lookups during debugging sessions.
  • Learning number systems in computer science courses.
  • Converting Unix chmod permission values between octal and decimal.
  • Verifying binary/hex values when reading packet captures or memory dumps.

Example Input and Output

Decimal 255 is binary 11111111, octal 377, and hexadecimal FF.

Decimal Input
255
All Bases
Binary: 11111111 | Octal: 377 | Hex: FF

Data Privacy

All conversions run in your browser. No data is sent to any server.

Frequently Asked Questions

What is the difference between binary, octal, decimal, and hex?

Binary (base 2) uses 0 and 1. Octal (base 8) uses 0–7. Decimal (base 10) uses 0–9. Hexadecimal (base 16) uses 0–9 plus A–F. All represent the same values in different notation systems.

Can I convert very large numbers?

Yes. The converter uses JavaScript BigInt, so there is no practical size limit.

Does hex input need the 0x prefix?

No. The 0x prefix is stripped automatically if present. Both "FF" and "0xFF" produce the same result.

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