Octal to Binary Converter

This free online octal / binary converts numbers between octal (base 8) and binary (base 2). It runs instantly in your browser with no sign-up required.

Enter your value above and the result updates instantly. This tool is commonly used for legacy Unix file permission notation and computer science coursework.

Frequently Asked Questions

Is the octal / binary free to use?

Yes, the octal / binary on ConverterHub is completely free, with no sign-up or limits.

Does this tool store or send my data anywhere?

No. It converts numbers between octal (base 8) and binary (base 2) entirely in your browser — nothing is uploaded to a server.