Binary & Number System Converter

How to Use the Binary & Number System Converter

This tool lets you convert numbers between binary, decimal, hexadecimal, and octal quickly and safely in your browser.

• Choose Simple Mode for direct conversion between two bases, or Advanced Mode to see all conversions at once.
• Enter your number in the input field. You can also include prefixes like 0b, 0x, or 0o, and underscores for readability.
• Click "Convert" to see the result. In Auto‑Detect mode, the tool will detect the base automatically.
• Use the Copy button to copy the result, or Download to save it as a .txt file.
• Use Clear to reset the fields and start a new conversion.

Key Features

• Convert between binary, decimal, hexadecimal, and octal.
• Simple Mode for quick one‑to‑one conversions.
• Advanced Mode to show all numeral systems at once.
• Auto‑Detect Mode that intelligently detects the input base.
• Supports prefixes like 0b, 0x, 0o and underscores in numbers.
• Works 100% locally in your browser with no data uploads.

Frequently Asked Questions