Mac Keyboard Shortcut Visualizer – Online Modifier Key Cheatsheet
Press a combination of modifier keys and see which common macOS shortcuts use them. Learn by experimentation.
UD5 Toolkit
Calculate precise soy sauce, Worcestershire sauce, and curing salt ratios for perfect homemade jerky. Built for food safety and bold flavor.
Press a combination of modifier keys and see which common macOS shortcuts use them. Learn by experimentation.
Enter a username and password to generate an .htpasswd entry using bcrypt. Runs entirely in browser.
Type a modern English word and get a possible Old English equivalent. Works offline with a limited but curated wordlist. Learn history.
Strip specific or all attributes from HTML tags. Clean up messy code. Keep the structure. Purely local.
Encrypt and decrypt text using AES in the browser with a password. Uses Web Crypto API. No data sent to server.
Press any key to see the corresponding JavaScript event key, code, and keyCode. An essential debugging tool for front-end developers handling keyboard input.
Check if a URL can be embedded in an iframe. Test your site’s defense against clickjacking. Browser‑based.
Press any key and see the full KeyboardEvent object: key, code, keyCode, modifier status. Dev tool.
Fill in event details and generate 'Add to Calendar' links for Google, Outlook, and Yahoo, plus a downloadable .ics file.
Enter two city names or coordinates and get the straight‑line distance in miles/km. Local calculation.
Calculate ideal stereo speaker placement (toe-in, distance from wall) for best soundstage. Visual diagram. For audiophiles. Local tool.
Find the optimal TV size for your room or the best viewing distance based on screen size and resolution (1080p, 4K, 8K). Simple THX/SMPTE reference.
Estimate BAC based on gender, weight, drinks consumed, and time. Uses Widmark formula. Educational tool, never encourage drunk driving. Local only.
Find out what day number of the year any date is (1‑366). Also shows days remaining. Simple reference.
Calculate the age of the moon in days since the last new moon. See illumination percentage. Simple algorithm.
Calculate the exact number of days, weeks, months, and workdays between two dates. Visual calendar highlights. Perfect for projects.
Combine multiple identical batteries in series and parallel and see the resulting voltage and total capacity. Electronics helper.
Track your subscriptions, calculate monthly and yearly totals, and find savings by pausing unused services. Local data.
Determine the minimum sample size needed for a survey or A/B test with a given confidence level and margin of error.
Compute confidence intervals for a population mean (known/unknown sigma) and proportion. All popular Z/T values. Local.
Easily compute posterior probabilities given prior, likelihood, and marginal likelihood. Visual diagram. All local.
Enter a number to find its golden ratio long and short segments. Use for pleasing design layouts. Instant.
Calculate new dimensions while preserving aspect ratio, or find the ratio from width and height. For video and images.
Find out how large you can print based on image resolution in pixels. Understand DPI and megapixels.
Learn about f‑stops and their effect on light and depth. Calculate equivalent exposure adjustments. Educational.
Find the CAGR of an investment given start and end values over a time period. Instant growth rate.
Measure your waist‑to‑hip ratio and learn about associated health risks. WHR interpretation. Educational only.
Find what day of the week any past or future date falls on. Uses Zeller’s congruence. Fun historical reference tool.
Enter two sides of a right triangle and get the third. Also gives area and perimeter. Simple and visual.
Find the centroid (center of mass) of any convex polygon by entering vertex coordinates. Useful for physics and design.