Number Base Converter – Binary, Octal, Decimal, Hex

✓ Free Number Base Converter, Binary Hex Decimal

Convert between binary, octal, decimal, and hexadecimal. BigInt support for very large numbers. Visual binary representation.

• 🔢 Binary, Octal, Dec, Hex — Convert between base 2, 8, 10, 16, and up to base 36 all at once.
• 🔢 BigInt Support — Handle very large numbers beyond JavaScript's safe integer range with BigInt.
• 📊 Visual Binary — See a visual representation of bits for binary conversion. Toggle between nibble and byte grouping.
• 🔒 Privacy First — All conversion is local using JavaScript's Number and BigInt APIs.

Full guide, how-to & FAQ →

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