Number Base Converter

How to Use the Number Base Converter

• Type a number in any base — binary, octal, decimal or hexadecimal.
• The tool auto-detects prefixes like 0x (hex), 0b (binary) and 0o (octal).
• All four bases are shown simultaneously with one-click copy.

Examples

• 255 → FF in hex, 11111111 in binary
• 0xFF → 255 in decimal
• 1010 → 10 in decimal (auto-detected as binary)

Privacy: All conversions happen locally in your browser. No data is sent to any server.