Convert numbers between bases 11 uses
Convert a number between binary, octal, decimal, and hexadecimal instantly in your browser.
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- Runs entirely in your browser — your number is never sent to a server
- Arbitrary-precision arithmetic — not limited to 32- or 64-bit integers
- Free, no account required
How it works
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1
Paste or enter the value you want to convert.
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2
Conversion happens instantly as you type.
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3
Review the result in the target format.
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4
Copy the result to your clipboard.
Why use this tool
Every dev utility, one place
Format, convert, encode, decode, and generate — no more juggling ten tabs.
100% private, always
Every tool runs in your browser — your code and data are never sent anywhere.
Works on any device
Runs on Windows, Mac, Linux, iOS, and Android — nothing to install.
Instant results
No queues, no build step — results update as you type.
Built to handle real data
Full Unicode support and RFC-compliant parsing, edge cases included.
Free, always
Free to use, with no rate limits, sign-up, or trial period.
Frequently asked questions
It utilizes modern JavaScript BigInt capabilities, allowing for incredibly massive numbers without precision loss.
Yes, negative values are supported with a standard minus sign rather than relying on two's complement binary.
This specific utility is designed exclusively for whole integers, not floating-point conversions.
No, entering a, b, c is treated exactly the same as A, B, C during the calculation.
It specifically targets the most common developer bases: Binary (2), Octal (8), Decimal (10), and Hexadecimal (16).
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