Number Base Converter

Convert between binary, octal, decimal, and hexadecimal.

Number Base Converter translates integers between binary, octal, decimal, and hex. Supports large values via BigInt and optional 0x / 0b / 0o prefixes. Conversion stays in your browser.

Frequently Asked Questions

Does my input leave the browser?

For this tool, processing stays in your browser. Nothing is uploaded to ToolWorld servers.

Can it convert floating-point numbers?

No. This tool is for integers only.

Are prefixes required?

Optional. You can paste FF or 0xFF for hex, and similar for binary/octal.