Web Tools

IEEE 754 Float Inspector

Visualize how floating-point numbers are stored in IEEE 754 binary format. Inspect sign bit, exponent, and mantissa for both 32-bit (single) and 64-bit (double) precision floats. Understand floating-point representation, NaN, Infinity, and precision limitations. Runs entirely in your browser — your data never leaves your machine.

ieee754 float binary number precision

Published May 31, 2026

All interactive tools run entirely in your browser. Your data never leaves your device.

How It Works

Enter any number (including special values like NaN, Infinity, -0) and select single or double precision. The inspector shows the exact binary layout: sign bit, exponent bits, and mantissa bits, along with their decoded values.

Features

Dual precision: inspect both 32-bit (single) and 64-bit (double) floats
Bit-level visualization: color-coded sign, exponent, and mantissa fields
Special values: correctly handles NaN, +/-Infinity, positive/negative zero
Hex representation: shows the raw hex encoding
Exponent details: displays both biased and unbiased exponent values
Scientific notation: accepts numbers in scientific notation (e.g., 1.5e10)
5 preset examples: Pi, 0.1 + 0.2, Max Float32, Negative Zero, Infinity
Private: all computation runs in your browser — no data transmitted

Use Cases

Understanding why 0.1 + 0.2 !== 0.3 in floating-point arithmetic
Debugging precision issues in numerical computing
Learning IEEE 754 binary representation for computer science courses
Analyzing special float values (NaN, Infinity, denormalized numbers)
Comparing single vs double precision for performance-critical code