Input
0b, 0o, and 0x prefixes are detected and switch the input base automatically.
Negative integers are supported and the sign is kept in every output.
Base converter
Base Converter
Enter an integer in any supported base and convert it locally with BigInt to binary, octal, decimal, hexadecimal, base32, and base36.
BigInt integersFrontend onlyOne-click copy
Ready for input
Conversion results
Base 2
Binary
Base 8
Octal
Base 10
Decimal
Base 16
Hexadecimal
Base 32
Base32
Base 36
Base36
Local conversion, no upload
Conversion uses only browser BigInt and string operations. The page does not call a backend, save history, or write input to the URL.
Built for practical checks
Large integer review
BigInt handles integers beyond the safe Number range for IDs, bitmasks, and chain values.
Common bases covered
One input produces base 2, 8, 10, 16, 32, and 36 output. Hex input accepts uppercase and lowercase letters.
Clear validation
Invalid characters, decimal input, and source-base mismatches produce direct error messages.
FAQ
Does it support decimals?
No. This first release handles integers only and shows a clear message for decimal input.
How are 0x, 0b, and 0o prefixes handled?
Those prefixes are detected automatically and switch the input base to hexadecimal, binary, or octal.
Is any content sent to a server?
No. All conversion and copying happens locally in your browser.