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Number Base Converter

Convert numbers between binary, octal, decimal and hexadecimal. Large integers are exact.

What it is for?
Runs in your browser Free, no sign-up
BIN
OCT
DEC
HEX

What it is for?

Exact at any size

The conversion uses BigInt, so a 64-bit ID or a long hash stays exact instead of being rounded. Spaces and underscores used as digit separators are ignored, and a minus sign is kept.