Convert numbers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16).
Editor
Upload, paste, or preview the source, tune the options, and leave with a copy-ready or downloadable result.
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Adjust settings and inspect the visible output.
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Formatted code, generated types, decoded values, or snippets appear here.
Privacy: This tool runs entirely in your browser. No data is sent to our servers. We don't store, share, or have access to any of the information you process here.
Editor workspace and output options
Use the result area as the copy-ready handoff for the next step in your work.
Use Number Base Converter when you need to convert numbers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16).
It is designed for quick local checks before you commit code, send a payload, paste into documentation, or hand data to another system.
A: Binary (2), Octal (8), Decimal (10), and Hexadecimal (16).
A: Yes, 0x prefix is automatically stripped before conversion.
A: The browser implementation is best for common integer and decimal values. Very large numbers should be verified before production use.
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Privacy: This tool runs entirely in your browser. No data is sent to our servers. We don't store, share, or have access to any of the information you process here.