Skip to content
Utilora

A/B Test Simulator - Conversion Rate Prediction

Data Tools

CSV: numeric feature columns + a 0/1 label column (last column, or named label/target/converted)

What is A/B Test Simulator - Conversion Rate Prediction?

A/B Test Statistical Simulator is an analytical utility designed to evaluate the statistical significance of split testing campaigns. Split testing is standard for optimizing websites, email newsletters, and ad campaigns. However, raw conversion counts can be misleading due to random chance. This simulator uses robust Bayesian and frequentist statistical models to calculate conversion rates, relative uplifts, p-values, and statistical power, showing you whether your variant is truly a winner.

How it works

The simulator calculates conversions and sample sizes, then computes standard Z-scores and two-tailed p-values for frequentist significance. It also uses beta-binomial distributions to simulate the probability that Variant B is better than Control A. These complex mathematical simulations are performed instantly in the browser client.

Features & Benefits

  • Fits logistic regression entirely client-side via WebAssembly
  • What-if sliders enable instant scenario exploration
  • No data leaves your browser - safe for sensitive experiment data

Frequently Asked Questions

What input format is expected?

A CSV file where columns are features and the last column (or any column named 'label', 'target', or 'converted') is the 0/1 outcome. The tool also accepts raw JSON: {features: [[...]], labels: [...], feature_names: [...]}.

How many iterations does training run?

500 gradient descent iterations with a learning rate of 0.1. Sufficient for most linearly-separable experiments.

Related Tools

Pattern Generator - Learn String Rules from Examples

Provide match and non-match string examples; a decision tree learns the pattern and exports it as Rust, JavaScript, or regex.

CSV Data Explorer - Column Analysis & Regression

Upload a CSV to auto-detect column types, spot missing values, and fit a linear regression - all locally in your browser.

Popular Utilities

JSON Formatter & Validator

Format, validate, and minify JSON instantly in your browser. Your data never leaves your device.

JWT Decoder

Decode JWT tokens and inspect header and payload instantly in your browser. Your tokens never leave your device.

Word Counter

Count words, characters, sentences, and estimate reading time instantly in your browser. No sign-up required.

Learn More & Guides

Zero-Backend Architecture: What It Means and Why It Matters

Zero-backend applications execute entirely in the browser, eliminating server-side privacy risks. Learn what zero-backend architecture means, how it works technically, and why it represents the future of privacy-conscious software.

11 min read

The Case for Local-First Tools in the Age of Cloud AI

Cloud AI promises power but sacrifices privacy. Explore the advantages of local-first tools that run AI in your browser-offline capability, no data sharing, and genuine user control.

9 min read

Why Privacy Guarantees Should Be Verifiable, Not Promised

Privacy policies mean nothing if they can't be verified. Learn why verifiable privacy-through architecture, open-source code, and auditability-is essential for tools that handle sensitive data.

10 min read

Building a Personal Developer Utility Suite with Browser Tools

Create your own toolkit of browser-based developer utilities. Learn how local tools for JSON formatting, regex testing, and JWT decoding can streamline your workflow without sending data to third-party services.

8 min read