Loading page
Tool workspace
Preparing this tool for you.
Tool workspace
Convert numbers between binary, octal, decimal, hexadecimal, and base-36 with real-time precision, supporting large integers and Unicode.
About this tool
Convert numbers between binary, octal, decimal, hexadecimal, and base-36 with real-time precision, supporting large integers and Unicode.
Number System Conversions is a free developer tool that runs entirely in your browser — nothing to install, no account to create, and your data never leaves your device. Open the page, add your input, and get a clean, copy-ready result in seconds.
Open Number System Conversions on AltFTool — it loads instantly in your browser.
Enter the values you already know.
Fine-tune the options to match your scenario.
Read the result and use it in your planning or reporting.
Enter what you know and see an accurate result immediately — no formulas or spreadsheets required.
Adjust the inputs to see exactly how each change affects the outcome before you decide.
Take a clear, precise number into your plans, reports, or conversations.
Yes — Number System Conversions is completely free on AltFTool, with no signup, no trial limits, and no hidden costs.
Yes. Number System Conversions runs in your browser, so what you enter or upload stays on your device instead of being sent to a server.
Convert numbers between binary, octal, decimal, hexadecimal, and base-36 with real-time precision, supporting large integers and Unicode. It's built for quick, everyday developer tasks with results you can copy or download straight away.
Yes — Number System Conversions works in any modern browser, on desktop, tablet, and mobile, with the same features everywhere.