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Number Base Converter — Binary, Octal, Decimal, Hex Online

Number Base Converter converts integers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Supports 0b, 0o, and 0x prefixes for unambiguous input.

Common Use Cases

  • Converting decimal values to hexadecimal for memory addresses
  • Converting binary bitmasks to decimal or hex
  • Understanding permission modes (e.g. chmod 755 in octal)

Frequently Asked Questions

How do I convert a number between bases?

Paste your number (e.g. 255, 0xFF, 0b11111111, or 0o377) into SmartDevBox. The Number Base Converter auto-detects the base from the prefix and converts to all four bases simultaneously.

Privacy & Security

This tool runs entirely in your browser using client-side JavaScript. No data is sent to a server — your input never leaves your machine. SmartDevBox has no account system, no usage tracking, and no paid tier. See the Privacy & Security page for full details.

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