Offline Access Skip to Main Content Simulations Physics Chemistry Math Earth Science Biology Browse Sims Prototypes Translated Sims Teaching About Tips for Using PhET Browse Activities Share Your Activities My Activities Virtual Workshop Research Accessibility About Accessible Simulations Research and Design Technical Implementation Donate Sign in / Register Sign In An invalid email address and/or password has been entered. Email address Password Remember me Forgot password? Don't have an account? Register. Resend Confirmation Time to update! We are working to improve the usability of our website. To support this effort, please update your profile! Skip for now Update Profile Search the PhET Website Offline Access Desktop/Laptop Computer Full Install The full PhET Offline Website Installer package installs a copy of the PhET website onto your computer. English Download installer with simulations only (no activities) Windows (includes Java) - 499 MB Mac OS X - 484 MB Linux - 484 MB Download installer with simulations and activities Windows (includes Java) - 1965 MB Mac OS X - 1937 MB Linux - 1950 MB All sims (these zip files contain simulations only) All sims - contains English Java, Flash, and HTML5 sims only - 275MB HTML5 sims English - contains all translated locales of HTML5 sims, instructions for specifying a locale here - 60MB HTML5 sims Spanish - contains all Spanish HTML5 sims, 60MB HTML5 sims Portuguese (Brazil) - contains all Portuguese (Brazil) HTML5 sims, 60MB {"locale-installer-windows-activities-en":"/installer/PhET-Installer-with-activities_windows.exe","locale-installer-linux-activities-pt_BR":"/installer/PhET-Installer-with-activities_pt_BR_linux.bin","english-sims-zip":"/archives/html.zip","locale-installer-windows-es":"/installer/PhET-Installer_es_windows.exe","locale-installer-macos-activities-es":"/installer/PhET-Installer-with-activities_es_osx.zip","portuguese-sims-zip":"/archives/html_pt_BR.zip","locale-installer-windows-activities-es":"/installer/PhET-Installer-with-activities_es_windows.exe","locale-installer-macos-en":"/installer/PhET-Installer_osx.zip","locale-installer-macos-activities-en":"/installer/PhET-Installer-with-activities_osx.zip","locale-installer-macos-activities-pt_BR":"/installer/PhET-Installer-with-activities_pt_BR_osx.zip","locale-installer-windows-activities-pt_BR":"/installer/PhET-Installer-with-activities_pt_BR_windows.exe","all-sims-zip":"/archives/all.zip","locale-installer-macos-es":"/installer/PhET-Installer_es_osx.zip","locale-installer-linux-activities-en":"/installer/PhET-Installer-with-activities_linux.bin","locale-installer-macos-pt_BR":"/installer/PhET-Installer_pt_BR_osx.zip","spanish-sims-zip":"/archives/html_es.zip","locale-installer-linux-es":"/installer/PhET-Installer_es_linux.bin","locale-installer-windows-pt_BR":"/installer/PhET-Installer_pt_BR_windows.exe","locale-installer-linux-pt_BR":"/installer/PhET-Installer_pt_BR_linux.bin","locale-installer-linux-activities-es":"/installer/PhET-Installer-with-activities_es_linux.bin","locale-installer-windows-en":"/installer/PhET-Installer_windows.exe","locale-installer-linux-en":"/installer/PhET-Installer_linux.bin"} Support Offline Access! 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Maybe later Donate now One at a Time Simulation Name HTML5 Flash Java Acid-Base Solutions HTML5 Java Alpha Decay Java Area Builder HTML5 Area Model Algebra HTML5 Area Model Decimals HTML5 Area Model Introduction HTML5 Area Model Multiplication HTML5 Arithmetic HTML5 Flash Atomic Interactions HTML5 Java Balancing Act HTML5 Java Balancing Chemical Equations HTML5 Java Balloons & Buoyancy Java Balloons and Static Electricity HTML5 Java Band Structure Java Battery-Resistor Circuit Java Battery Voltage Java Beer's Law Lab HTML5 Java Bending Light HTML5 Java Beta Decay Java Blackbody Spectrum HTML5 Flash Build a Fraction HTML5 Java Build a Molecule HTML5 Java Build an Atom HTML5 Java Buoyancy Flash Calculus Grapher Flash Capacitor Lab Java Capacitor Lab: Basics HTML5 Charges and Fields HTML5 Flash Circuit Construction Kit (AC+DC) Java Circuit Construction Kit (AC+DC), Virtual Lab Java Circuit Construction Kit: DC HTML5 Circuit Construction Kit (DC Only) Java Circuit Construction Kit: DC - Virtual Lab HTML5 Circuit Construction Kit (DC Only), Virtual Lab Java Collision Lab Flash Color Vision HTML5 Java Concentration HTML5 Java Conductivity Java Coulomb's Law HTML5 Curve Fitting HTML5 Flash Davisson-Germer: Electron Diffraction Java Density Flash Diffusion HTML5 Double Wells and Covalent Bonds Java Eating & Exercise Java Electric Field Hockey Java Electric Field of Dreams Java Energy Forms and Changes HTML5 Java Energy Skate Park HTML5 Java Energy Skate Park: Basics HTML5 Java Equality Explorer HTML5 Equality Explorer: Basics HTML5 Equality Explorer: Two Variables HTML5 Equation Grapher Flash Estimation Flash Expression Exchange HTML5 Faraday's Electromagnetic Lab Java Faraday's Law HTML5 Flash Fluid Pressure and Flow Java Forces and Motion Java Forces and Motion: Basics HTML5 Java Forces in 1 Dimension Java Fourier: Making Waves Java Fraction Matcher HTML5 Java Fractions: Equality HTML5 Fractions: Intro HTML5 Fractions Intro Java Fractions: Mixed Numbers HTML5 Friction HTML5 Flash Function Builder HTML5 Function Builder: Basics HTML5 Gases Intro HTML5 Gas Properties HTML5 Java Gene Expression Essentials HTML5 Gene Expression - The Basics Java Gene Machine: The Lac Operon Java Generator Java Geometric Optics Flash Glaciers Java Graphing Lines HTML5 Java Graphing Quadratics HTML5 Graphing Slope-Intercept HTML5 Gravity And Orbits HTML5 Gravity and Orbits Java Gravity Force Lab HTML5 Java Gravity Force Lab: Basics HTML5 The Greenhouse Effect Java Hooke's Law HTML5 Isotopes and Atomic Mass HTML5 Java John Travoltage HTML5 Java Ladybug Motion 2D Java Ladybug Revolution Java Lasers Java Least-Squares Regression HTML5 Lunar Lander Flash Magnet and Compass Java Magnets and Electromagnets Java Make a Ten HTML5 Masses and Springs HTML5 Masses & Springs Flash Masses and Springs: Basics HTML5 Maze Game Java Membrane Channels Java Microwaves Java Models of the Hydrogen Atom Java Molarity HTML5 Java Molecular Motors Java Molecule Polarity HTML5 Java Molecules and Light HTML5 Java Molecule Shapes HTML5 Java Molecule Shapes: Basics HTML5 Java Motion in 2D Java The Moving Man Java My Solar System Flash Natural Selection HTML5 Java Neon Lights & Other Discharge Lamps Java Neuron HTML5 Java Normal Modes Flash Nuclear Fission Java Number Line: Integers HTML5 Ohm's Law HTML5 Flash Optical Quantum Control Java Optical Tweezers and Applications Java Pendulum Lab HTML5 Flash Photoelectric Effect Java pH Scale HTML5 Java pH Scale: Basics HTML5 Plate Tectonics Java Plinko Probability HTML5 Flash Projectile Motion HTML5 Flash Proportion Playground HTML5 Quantum Bound States Java Quantum Tunneling and Wave Packets Java Quantum Wave Interference Java Radiating Charge Flash Radioactive Dating Game Java Radio Waves & Electromagnetic Fields Java The Ramp Java Ramp: Forces and Motion Java Reactants, Products and Leftovers HTML5 Java Reactions & Rates Java Resistance in a Wire HTML5 Flash Resonance Flash Reversible Reactions Java Rutherford Scattering HTML5 Java Salts & Solubility Java Self-Driven Particle Model Java Semiconductors Java Signal Circuit Java Simplified MRI Java Sound Java States of Matter HTML5 Java States of Matter: Basics HTML5 Java Stern-Gerlach Experiment Flash Stretching DNA Java Sugar and Salt Solutions Java Torque Java Trig Tour HTML5 Under Pressure HTML5 Java Unit Rates HTML5 Vector Addition HTML5 Flash Vector Addition: Equations HTML5 Wave Interference HTML5 Java Wave on a String HTML5 Flash Chromebook We offer an Android app that allows native offline use of all the HTML5 sims. Find it on the Play Store here. It is available on select Chromebooks. All the HTML5 sims in an app! Compatible with select Chromebooks Ideal for offline use Includes favorites, filtering, and automatic updates All proceeds support HTML5 sims (only $0.99!) One at a Time Simulation Name Technology Acid-Base Solutions HTML5 Area Builder HTML5 Area Model Algebra HTML5 Area Model Decimals HTML5 Area Model Introduction HTML5 Area Model Multiplication HTML5 Arithmetic HTML5 Atomic Interactions HTML5 Balancing Act HTML5 Balancing Chemical Equations HTML5 Balloons and Static Electricity HTML5 Beer's Law Lab HTML5 Bending Light HTML5 Blackbody Spectrum HTML5 Build a Fraction HTML5 Build a Molecule HTML5 Build an Atom HTML5 Capacitor Lab: Basics HTML5 Charges and Fields HTML5 Circuit Construction Kit: DC HTML5 Circuit Construction Kit: DC - Virtual Lab HTML5 Color Vision HTML5 Concentration HTML5 Coulomb's Law HTML5 Curve Fitting HTML5 Diffusion HTML5 Energy Forms and Changes HTML5 Energy Skate Park HTML5 Energy Skate Park: Basics HTML5 Equality Explorer HTML5 Equality Explorer: Basics HTML5 Equality Explorer: Two Variables HTML5 Expression Exchange HTML5 Faraday's Law HTML5 Forces and Motion: Basics HTML5 Fraction Matcher HTML5 Fractions: Equality HTML5 Fractions: Intro HTML5 Fractions: Mixed Numbers HTML5 Friction HTML5 Function Builder HTML5 Function Builder: Basics HTML5 Gases Intro HTML5 Gas Properties HTML5 Gene Expression Essentials HTML5 Graphing Lines HTML5 Graphing Quadratics HTML5 Graphing Slope-Intercept HTML5 Gravity And Orbits HTML5 Gravity Force Lab HTML5 Gravity Force Lab: Basics HTML5 Hooke's Law HTML5 Isotopes and Atomic Mass HTML5 John Travoltage HTML5 Least-Squares Regression HTML5 Make a Ten HTML5 Masses and Springs HTML5 Masses and Springs: Basics HTML5 Molarity HTML5 Molecule Polarity HTML5 Molecules and Light HTML5 Molecule Shapes HTML5 Molecule Shapes: Basics HTML5 Natural Selection HTML5 Neuron HTML5 Number Line: Integers HTML5 Ohm's Law HTML5 Pendulum Lab HTML5 pH Scale HTML5 pH Scale: Basics HTML5 Plinko Probability HTML5 Projectile Motion HTML5 Proportion Playground HTML5 Reactants, Products and Leftovers HTML5 Resistance in a Wire HTML5 Rutherford Scattering HTML5 States of Matter HTML5 States of Matter: Basics HTML5 Trig Tour HTML5 Under Pressure HTML5 Unit Rates HTML5 Vector Addition HTML5 Vector Addition: Equations HTML5 Wave Interference HTML5 Wave on a String HTML5 Waves Intro HTML5 iPad We offer an iPad app that allows native offline use of all the HTML5 sims. Find it on the app store here. All the HTML5 sims in an app! Natively designed for iPad Ideal for offline use Includes favorites, filtering, and automatic updates All proceeds support HTML5 sims (only $0.99!) In order to 'Download' an individual sim to use on an iPad (offline), you'll need to add it to the iPad reading list. To access a PhET simulation on an iPad while not connected to the internet, first open the sim in Safari by clicking the play button. Tap the Action button and then tap Add to Reading List. In the future, simply tap the Bookmarks icon and tap the sim page that is saved in the Reading List. One at a Time Simulation Name Technology Acid-Base Solutions HTML5 Area Builder HTML5 Area Model Algebra HTML5 Area Model Decimals HTML5 Area Model Introduction HTML5 Area Model Multiplication HTML5 Arithmetic HTML5 Atomic Interactions HTML5 Balancing Act HTML5 Balancing Chemical Equations HTML5 Balloons and Static Electricity HTML5 Beer's Law Lab HTML5 Bending Light HTML5 Blackbody Spectrum HTML5 Build a Fraction HTML5 Build a Molecule HTML5 Build an Atom HTML5 Capacitor Lab: Basics HTML5 Charges and Fields HTML5 Circuit Construction Kit: DC HTML5 Circuit Construction Kit: DC - Virtual Lab HTML5 Color Vision HTML5 Concentration HTML5 Coulomb's Law HTML5 Curve Fitting HTML5 Diffusion HTML5 Energy Forms and Changes HTML5 Energy Skate Park HTML5 Energy Skate Park: Basics HTML5 Equality Explorer HTML5 Equality Explorer: Basics HTML5 Equality Explorer: Two Variables HTML5 Expression Exchange HTML5 Faraday's Law HTML5 Forces and Motion: Basics HTML5 Fraction Matcher HTML5 Fractions: Equality HTML5 Fractions: Intro HTML5 Fractions: Mixed Numbers HTML5 Friction HTML5 Function Builder HTML5 Function Builder: Basics HTML5 Gases Intro HTML5 Gas Properties HTML5 Gene Expression Essentials HTML5 Graphing Lines HTML5 Graphing Quadratics HTML5 Graphing Slope-Intercept HTML5 Gravity And Orbits HTML5 Gravity Force Lab HTML5 Gravity Force Lab: Basics HTML5 Hooke's Law HTML5 Isotopes and Atomic Mass HTML5 John Travoltage HTML5 Least-Squares Regression HTML5 Make a Ten HTML5 Masses and Springs HTML5 Masses and Springs: Basics HTML5 Molarity HTML5 Molecule Polarity HTML5 Molecules and Light HTML5 Molecule Shapes HTML5 Molecule Shapes: Basics HTML5 Natural Selection HTML5 Neuron HTML5 Number Line: Integers HTML5 Ohm's Law HTML5 Pendulum Lab HTML5 pH Scale HTML5 pH Scale: Basics HTML5 Plinko Probability HTML5 Projectile Motion HTML5 Proportion Playground HTML5 Reactants, Products and Leftovers HTML5 Resistance in a Wire HTML5 Rutherford Scattering HTML5 States of Matter HTML5 States of Matter: Basics HTML5 Trig Tour HTML5 Under Pressure HTML5 Unit Rates HTML5 Vector Addition HTML5 Vector Addition: Equations HTML5 Wave Interference HTML5 Wave on a String HTML5 Waves Intro HTML5 About PhET Our Team Sponsors Partnerships Offline Access Help Center Contact Source Code Licensing For Translators Choose language English العربية (السعودية) Basque беларускі Bosnian 中文 (中国) 中文 (台灣) hrvatski čeština Dansk Nederlands Eesti suomi français Gallegan Georgian Deutsch Ελληνικά magyar Bahasa Indonesia italiano 日本語 한국어 Kurdish Kurdish (Turkey) македонски Marathi Mongolian Norwegian Bokmål Norwegian Nynorsk Persian português português (Brasil) română Српски Sinhalese Slovenčina español español (Perú) ไทย Türkçe українська Tiếng Việt English العربية Euskara Беларуская Bosanski 简体中文 正體中文 Hrvatski Česky Dansk Nederlands Eesti Suomi Français Galego ქართული Deutsch Ελληνικά Magyar Bahasa Indonesia Italiano 日本語 한국어 كوردي Kurdî Македонски मराठी Монгол Norsk bokmål Norsk nynorsk فارسی Português Português do Brasil Română Српски සිංහල Slovensky Español Español Internacional ไทย Türkçe Українська Tiếng Việt ©2021 University of Colorado. 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