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.
Bad Boy Meter
Fun red flag quiz: tick his style and habits, get a bad...
Open tool→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...
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