Number Base Converter

Enter a number in any base — decimal, hexadecimal, binary, or octal — and see all four at once. Exact for huge values, and not uploaded to our servers for processing.

Tool processing runs in your browser — your pastes/files are not uploaded to our servers for processing.Details

Number

Input base

Decimal (base 10)

Hexadecimal (base 16)

Binary (base 2)

Octal (base 8)

Common conversions: hex to decimal · decimal to hex · binary to decimal · decimal to binary

Frequently asked questions

How do I convert hexadecimal to decimal?

Choose Hexadecimal as the input base and type the hex digits (for example FF). The decimal value (255) and the binary and octal forms appear instantly.

Does it handle very large numbers?

Yes. The converter uses BigInt, so values well beyond 64 bits stay exact — unlike calculators that lose precision above 9,007,199,254,740,991.

What input formats are accepted?

Plain digits for the selected base, with or without the 0x / 0b / 0o prefix and spaces. Hex is case-insensitive. Invalid digits for the chosen base show an error.

Is my input uploaded?

No. TryDevSnip converts locally with the browser's BigInt engine. Nothing you type is uploaded to our servers for processing.