All Tools
Discover our complete collection of free online tools. From SEO and development to design and content creation, find the perfect tool for every task.
Quarter Mile ET & Horsepower Calculator
Predict your quarter-mile ET and trap speed, or back into horsepower from...
Open tool→PC Power Supply (PSU) Wattage Calculator
Find the right PSU wattage for your PC build in a few...
Open tool→Cycling FTP & Power Zone Calculator
Turn one test effort into your FTP and full training power zones.
Open tool→Chess Elo Rating Calculator
See your exact Elo rating change, win probability, and tournament performance rating.
Open tool→Robots.txt Tester & Validator
See exactly which robots.txt rule allows or blocks any URL, for any...
Open tool→Random MAC Address Generator
Generate valid, collision-safe MAC addresses in bulk, in any format.
Open tool→package.json Generator
Turn a form into a complete, ready-to-use package.json.
Open tool→Dockerfile Generator
Generate a production-ready Dockerfile for your stack in seconds.
Open tool→Drywall Calculator
Find out exactly how many drywall sheets, screws, and joint compound a...
Open tool→Roof Pitch Calculator
Convert roof pitch to degrees, percent grade, or rafter length in one...
Open tool→AI Regex Generator
Describe what you want to match in plain English and get a...
Open tool→Swim Pace Calculator
Enter distance and time to get swim pace per 100m/yd, a split...
Open tool→Puppy Weight Predictor Calculator
Enter a puppy's age, weight, and breed size to predict its adult...
Open tool→Battery Life / Runtime Calculator
Enter battery capacity and device draw to get runtime in seconds through...
Open tool→Stair Stringer Calculator
Enter total rise and desired step size to get code-compliant riser/tread counts...
Open tool→Roofing Shingle Calculator
Enter roof dimensions and pitch to get squares, bundles, underlayment, ridge cap,...
Open tool→Fence Calculator
Enter fence length, height, and style to get posts, panels, rails, concrete...
Open tool→Slope Calculator
Enter two points and instantly get the slope, all three line equation...
Open tool→Permutation & Combination Calculator
Calculate nPr and nCr instantly, with or without repetition, and see the...
Open tool→LED Resistor Calculator
Get the exact resistor value, wattage, and color bands for any single,...
Open tool→Test Credit Card Number Generator
Luhn-valid fake card numbers with CVV and expiry, for QA and form...
Open tool→Random User Agent Generator
Realistic, filterable User-Agent strings for testing and QA, exportable in bulk.
Open tool→Scientific Calculator
Trig, logs, powers, memory, and history — a proper scientific calculator in...
Open tool→Fantasy Name Generator
Race-specific fantasy names for D&D, Pathfinder, and fiction, with surnames and epithets.
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