Stop Shipping Floating-Point Bugs
FloatSafe gives you a visual, interactive workspace to compare floating-point numbers safely. Catch IEEE 754 precision traps before they reach production — with real-time validation and smart suggestions baked in.
Why this matters
0.1 + 0.2 === 0.3 // false ❌
Math.abs(0.1 + 0.2 - 0.3) < Number.EPSILON // true ✅
Real-Time Validation
Instant feedback as you type comparisons
IEEE 754 Insights
Visualise binary representation & ULP distance
Safe Suggestions
Auto-suggest epsilon, relative, or decimal methods
Simple Pricing
Pro
$12
per month
- ✓Interactive float comparison editor
- ✓IEEE 754 binary visualiser
- ✓Safe comparison code snippets
- ✓Epsilon & ULP analysis
- ✓Unlimited saved comparisons
- ✓Priority email support
Cancel anytime. No hidden fees.
FAQ
Why can't I just use === to compare floats?
IEEE 754 floating-point arithmetic introduces rounding errors. 0.1 + 0.2 produces 0.30000000000000004, not 0.3. Direct equality checks fail silently, causing subtle bugs in financial, scientific, and game logic.
What comparison methods does FloatSafe suggest?
FloatSafe recommends the right method for your context: absolute epsilon for small numbers, relative epsilon for large-scale values, ULP-based comparison for precision-critical code, and decimal libraries for financial calculations.
Which languages and environments are supported?
FloatSafe currently generates safe comparison snippets for JavaScript, TypeScript, Python, and Rust, with more languages on the roadmap.