Does it support large integers?
Yes. BigInt handles integers beyond safe Number range.
Number Base Converter
DevTools Number Base Converter converts between binary, octal, decimal, and hexadecimal using BigInt—handy for debugging, protocol parsing, and bit flags, all locally in your browser.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal—handy for frontend, backend, and embedded debugging.
- Binary
- 0b11111111
- Octal
- 0o377
- Decimal
- 255
- Hexadecimal
- 0XFF
About this tool
BigInt avoids Number precision limits, so large IDs, bit masks, and hex config values convert reliably.
How to use
- Select the input base.
- Enter a number, optionally with 0b / 0o / 0x prefix.
- View instant output in other bases.
FAQ
Can I enter negative numbers?
Yes. Values like -255 or -0xff keep the sign across all bases.
Does it support decimals?
Only integers in the current version. Floating-point base conversion is not supported yet.
Is conversion done locally?
Yes. All math runs in your browser.
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