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Decimal ↔ Octal Converter Privacy: All processing runs locally

Convert integers between decimal (base 10) and octal (base 8) number systems.

How It Works

This tool converts integers between the decimal (base 10) system and the octal (base 8) system. Octal uses digits 0 through 7 and is commonly used in Unix file permissions and some low-level programming contexts.

Examples:

  • Decimal 0 = Octal 0
  • Decimal 8 = Octal 10
  • Decimal 42 = Octal 52
  • Decimal 100 = Octal 144
  • Decimal 255 = Octal 377
  • Decimal 511 = Octal 777 (common Unix permission)

Negative numbers are supported with a minus sign prefix. All processing happens locally in your browser.