Physion

Overview

Physion is ranked #29 of 91 in physics simulation software on Specifiction. It runs on Web. There is a free plan. Paid plans start at $6/mo.

Compared on physics simulation software

Free plan

Yesphysion.net

Paid from

$6/mophysion.net

Delivery mode

webphysion.net

Authoring tools

Yesphysion.net

3D visuals

Nophysion.net

Offline access

Nophysion.net

Facts

What it does

Physion is a browser-based 2D physics simulator for designing and running interactive physics experiments.physion.net · 28 Sept 2026

Shape and mechanism tools

It supports shapes including circles, rectangles, capsules, polygons, text bodies, polylines, spirals and gears, plus joints, springs and ropes.physion.net · 28 Sept 2026

Liquid and particle simulation

Physion simulates liquids, soft bodies and particle emitters using particle simulation.physion.net · 28 Sept 2026

Boolean and laser tools

The simulator provides boolean operations for combining or cutting shapes and laser rays that reflect off surfaces.physion.net · 28 Sept 2026

JavaScript scripting

Users can attach standard JavaScript Node Scripts to objects, handle lifecycle and collision callbacks, access the physion global and import external JavaScript libraries.physion.net · 28 Sept 2026

Graphs and force diagrams

Physion includes live graphs for motion, force, momentum and energy properties and free-body diagrams showing gravity, normal, friction, joint-reaction and spring forces.physion.net · 28 Sept 2026

Browser and installation

Physion runs in a modern desktop browser with no download, installer, plugin or browser extension, and scenes can be shared by URL.physion.net · 28 Sept 2026

Mobile limitation

Phones and tablets can open, watch and interact with existing scenes, but drawing and editing tools are disabled there.physion.net · 28 Sept 2026

Offline limitation

Physion requires an internet connection, stores saved scenes on its servers and has no offline or downloadable local app mode.physion.net · 28 Sept 2026

Authentication and billing integrations

Accounts use Google or Facebook sign-in, while paid subscriptions are handled through Stripe inside the app.physion.net · 28 Sept 2026

Security and processing

Physics calculations run locally in the user's browser rather than on a server, and Physion says it never sees card details because Stripe handles billing.physion.net · 28 Sept 2026

Open-source status

The Physion app is not open source, although the physion-assets and physion-translations companion repositories are public and open to contributions.physion.net · 28 Sept 2026

Target users

The maker describes Physion for teachers, students and hobbyists building classroom demonstrations, experiments and mechanical creations.physion.net · 28 Sept 2026

Support

Users can ask questions or discuss school and classroom needs on Discord, and the Pro plan includes premium support.physion.net · 28 Sept 2026

Usage limits

Only account scene saves are metered; building, running and opening scenes are unlimited, with the monthly save count resetting at the start of each calendar month.physion.net · 28 Sept 2026

Where it ranks on Specifiction

• Best Physics Simulation Software in 2026#29 of 91

Sources

• physion.net· checked 28 Sept 2026
• physion.net/docs/faq· checked 28 Sept 2026
• physion.net/pricing· checked 28 Sept 2026