Number Base Converter
Translate integers of any size between binary, octal, decimal, hexadecimal and a custom base from 2 to 36, with signed two's-complement or unsigned interpretation at 8, 16, 32 or 64 bits. Click bits in the grid to toggle them, view and swap the byte order, and read popcount, leading zeros and set-bit positions. The bitwise playground evaluates AND, OR, XOR, NOT, shifts and rotates on two operands, and the IEEE-754 view breaks a decimal or raw hex value into float32 and float64 sign, exponent and mantissa with rounding error.
00 00 00 CA····CA 00 00 00····Set bits: 1, 3, 6, 7 → 2^1 + 2^3 + 2^6 + 2^7
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How to use Number Base Converter
- 1Type a number in any of the base fields (prefixes like 0x and underscores are fine).
- 2Choose signed or unsigned and the bit width; click bits in the grid to toggle them.
- 3Open Bitwise to combine two operands, or IEEE-754 to inspect a float's bits.
- 4Copy any field or all formats at once.
About Number Base Converter
Translate integers of any size between binary, octal, decimal, hexadecimal and a custom base from 2 to 36, with signed two's-complement or unsigned interpretation at 8, 16, 32 or 64 bits. Click bits in the grid to toggle them, view and swap the byte order, and read popcount, leading zeros and set-bit positions. The bitwise playground evaluates AND, OR, XOR, NOT, shifts and rotates on two operands, and the IEEE-754 view breaks a decimal or raw hex value into float32 and float64 sign, exponent and mantissa with rounding error.
Number Base Converter is part of FizzKit — a collection of focused developer and ad-tech tools. Because everything runs locally, it works offline once loaded and never exposes your data to a remote server.