About LotofTools

Our Mission

LotofTools is building 1,000+ free browser-based tools for founders, developers, and creators. Every calculator, converter, and generator on this site runs entirely in your browser — no data ever leaves your device.

How Tools Are Built

Each tool is built using TypeScript and React, running entirely client-side. Formulas and methodologies are based on established industry standards and are reviewed for accuracy. For financial tools, we follow standard accounting and venture finance definitions. For statistical tools, we implement peer-reviewed methods (Bayesian inference, frequentist Z-tests, etc.).

Tools are updated when methodologies evolve or when users identify errors. Every tool page shows a “Last reviewed” date so you know how current the content is.

Free Forever

All tools on LotofTools are free — no freemium, no paywalls, no signup required. We are committed to keeping every tool accessible to everyone, from solo founders to large teams.

Privacy

Since all calculations happen in your browser, your data stays private by design. We use Google Analytics for aggregate usage statistics (page views, not personal data). No user accounts, no stored calculations, no third-party data sharing.