Float Comparison Checker

Paste code below to instantly detect unsafe floating point equality checks and get safer alternatives.

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$8/mo

  • ✓ Batch file validation
  • ✓ VS Code & JetBrains plugin
  • ✓ CI/CD API access
  • ✓ Priority support
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FAQ

Why are float comparisons dangerous?

Floating point numbers have limited precision. 0.1 + 0.2 does not equal exactly 0.3 in binary, so strict equality checks can silently fail.

What is the epsilon approach?

Instead of a === b, use Math.abs(a - b) < Number.EPSILON to check if two floats are close enough to be considered equal.

Which languages does the checker support?

The free checker works on JavaScript and TypeScript. Pro unlocks Python, Java, C++, Go, and Rust analysis with language-specific best practices.