Math & Numbers

Compute gravitational potential energy, mass, or height from the other two, with impact velocity

Math & Numbers

Compute range, max height, flight time, and the full trajectory of a projectile given speed, angle, and optional initial height

Design

A curated 2026 reference of image dimensions for Instagram, Facebook, X, LinkedIn, YouTube, TikTok, Pinterest and WeChat — filterable by platform.

Media

Convert a bitmap image into reconstruction-first audio designed to reappear in a spectrogram, then export the audio and a verification spectrogram preview together.

Math & Numbers

Combine resistors in series, parallel, or an arbitrary +/| expression, with per-resistor voltage and power

Data Visualization

Bin numeric data into intervals and draw a histogram to visualize a statistical distribution

Development

Compress HTML by removing comments, collapsing whitespace and minifying inline CSS/JS

Format Conversion

Compress JSON data by removing all unnecessary whitespace

Sports

Compare a powerlifting total across four strength coefficient systems side by side: DOTS, Wilks (1994), IPF GL Points and Goodlift. Enter sex, body weight and three-lift total (squat + bench + deadlift) in kg or lb, and see each formula's points, coefficient, relative-strength tier and a progress bar showing how close the total is to each system's elite threshold. Complements the existing Wilks calculator by adding DOTS and IPF GL rather than replacing it.

Text Processing

Deduplicate lines in a list or text block. Keep the first or last occurrence, with options for case sensitivity, whitespace trimming, and dropping empty lines.

Math & Numbers

Determine the limiting reagent and compute theoretical yield, actual yield, and percent yield from a balanced reaction.

Text Processing

Convert text to Sentence case: capitalize the first letter of each sentence and lowercase everything else. Auto-restores the standalone pronoun "I".