Wonderstacked

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Number Base Converter

The Number Base Converter translates a number between binary, octal, decimal and hexadecimal, showing all four representations side by side so you can read across bases in one step. It handles negative values, accepts hex in either case, and runs entirely in your browser with no signup.

Last updated · Free, no signup

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What does a number-base converter do?

A number-base converter represents the same integer in binary, octal, decimal, and hexadecimal notation. Seeing all four forms together is useful when translating bit masks, file permissions, protocol fields, color values, and low-level debugging output without recalculating each base separately.

The converter uses native integer parsing, accepts signed values, and displays hexadecimal output in uppercase. It works with whole numbers only: fractional input is not represented accurately, and negative values are shown with a minus sign rather than as a fixed-width two's-complement bit pattern.