Number Base Converter
Binary: 11111111
Octal: 377
Decimal: 255
Hex: FF
Base 36: 73
Number Base Converter — Free Online Tool
Converts integers between binary (base-2), octal (base-8), decimal (base-10), and hexadecimal (base-16), plus an arbitrary base up to 36, with live two-way conversion — useful for bitmask and flag math, color value work, and reading protocol specifications.
How to use the Number Base Converter
- Open the tool above — it runs entirely in your browser, so your input never leaves this page.
- Paste or type your input into the field, then press the relevant button (e.g. Encode / Decode, Generate, or Convert).
- Copy the result from the output area with the copy button orCtrl/Cmd + C.
- No signup, no upload, and no tracking — repeat as often as you need.
Frequently asked questions
Is the Number Base Converter free to use?
Yes. The Number Base Converter is completely free, with no signup, no ads inside the tool, and no hidden limits.
Does the Number Base Converter upload my data?
No. The Number Base Converter processes everything locally in your browser. Your input is never sent to a server, so it stays private even on shared devices.
Does the Number Base Converter work offline?
After the page loads, the Number Base Converter runs entirely in your browser, so it keeps working without a network connection.
Free & private — why use this Number Base Converter
The Number Base Converter runs 100% client-side in your browser. Your data is never uploaded to a server, no account is required, and the tool is completely free. It works offline once the page has loaded and is part of a growing collection of privacy-first developer utilities.