IEEE-754 inspector

See the sign, exponent, and mantissa bits behind any double-precision float.

Exact IEEE-754 representation: the value shown is what the hardware stores. float32 keeps ~7 decimal digits, float64 ~15. Hex input is big-endian, the layout in memory dumps.

Numbers stay in this browser.

How to use

  1. Enter a number (decimal, hex, or binary).
  2. Read the bit fields.
  3. Compare with the exact stored value.

What it supports

64-bit doubles only. Shows sign/exponent/fraction bits, the exact stored decimal, and float64→float32 rounding. Special values (NaN, ±Infinity, ±0, subnormals) are labeled.

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