SquirrelPlan – Free, open-source financial future simulator

Summary: SquirrelPlan is a client-side, open-source tool that visualizes financial projections using standard and Monte Carlo simulations. It helps users plan early retirement and track investment growth without requiring sign-up or sharing data.

What it does

SquirrelPlan projects assets and liabilities over time, runs Monte Carlo simulations to assess plan success probabilities, and allows importing/exporting financial plans as JSON files. It operates entirely in the browser, keeping data local.

Who it's for

It is designed for individuals interested in personal finance and early retirement planning who want detailed financial projections without subscriptions or data sharing.

Why it matters

SquirrelPlan provides transparent, privacy-focused financial simulations that help users understand and manage their wealth trajectories effectively.