Everything in the catalog

Rigid body simulation of a Newtons cradle with adjustable settings.

Simulates a pendulum clock with an escapement driving the pendulum.

Shows the pendulum direction field and trajectories in phase space.

Plots the reaction force at the pivot of a swinging pendulum.

Drops blocks into a pile and watches the rigid body stacking.

Collides polygon shapes with each other in a 2D physics engine.

Simulates colliding rigid bodies with adjustable elasticity.

Applies forces to a rigid body and shows resulting motion and rotation.

Simulates a double pendulum made of two rigid rods and its chaotic motion.

Simulates a car on an editable roller coaster track with energy graphs.

Roller coaster car that can leave the track and fly as a projectile.

Roller coaster car attached to a spring while rolling on a track.

Simulates a simple pendulum with graphs of angle, velocity and energy.

Models three atoms joined by springs to show vibration modes.

Solves the wave equation on a string and shows how it vibrates.

Decodes Base64 strings back to text or a downloadable file.

Encodes text or files into Base64 with charset and URL-safe options.

Applies SHA-256 twice to the input, as used for Bitcoin-style hashing.

Converts a string into its hexadecimal byte representation.

Escapes special characters in text as HTML entities.

Hashes typed text or an uploaded file with MD5 in the browser.

Computes SHA-1 digests of text or a file locally in the browser.

Calculates the SHA-256 checksum of a local file without uploading it.

Hashes text or files with the SHA3-256 algorithm in the browser.