Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal and any base from 2 to 36, with BigInt precision.
About the Number Base Converter
The Number Base Converter converts integers between binary, octal, decimal, hexadecimal and any base from 2 to 36 at once. It uses arbitrary-precision BigInt, so very large numbers stay exact.
Conversion happens in your browser, so your files and records stay private.
How to use the Number Base Converter
- Type a number in the binary, octal, decimal or hexadecimal field.
- Set a custom base (2–36) if you need another one.
- Read every representation instantly and copy the one you need.
Frequently asked questions
How large can numbers be?
There is no practical limit: BigInt keeps every digit exact, unlike regular floating-point numbers.
Do I need prefixes like 0x or 0b?
No. The field you type in defines the base, so enter the digits only.
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