Developer Tool
Stop Getting Burned by Floating Point Bugs
Interactive playground to safely compare floats, generate correct comparison code in multiple languages, and never ship 0.1 + 0.2 === 0.3 bugs again.
// Playground preview
const a = 0.1 + 0.2;
const b = 0.3;
// ❌ Unsafe: a === b → false
// ✅ Safe: Math.abs(a - b) < Number.EPSILON → true
⚡
Instant Comparison
Test float comparisons with epsilon, ULP, and relative tolerance methods.
📋
Code Generation
Get correct snippets in JS, Python, Rust, Go, C++, and more.
🔁
Batch Processing
Upload CSV data and validate thousands of comparisons at once. Pro only.
Simple Pricing
Pro
$5
per month
- ✓Unlimited comparisons
- ✓Code generation (8 languages)
- ✓Batch CSV processing
- ✓REST API access
- ✓Priority support
Cancel anytime. No credit card required for trial.
FAQ
Why can't I just use === for floats?
IEEE 754 floating-point arithmetic introduces rounding errors. 0.1 + 0.2 evaluates to 0.30000000000000004, not 0.3. Direct equality checks fail unpredictably.
What comparison methods does FloatSafe support?
Absolute epsilon, relative epsilon, ULP (units in the last place) distance, and combined tolerance strategies — each suited for different use cases.
Which languages can I generate code for?
JavaScript, TypeScript, Python, Rust, Go, C, C++, and Java. Pro subscribers get all languages plus custom epsilon configuration.