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Best tools
Best Free Tool Collections
Curated toolkits for the way you actually work. Every tool is free and runs in your browser.
Free Tools for Developers
A free developer toolkit: Base64, JSON, hashing, UUID, timestamps, data format converters and more. No sign-up, all in your browser.
83 tools
Free Tools for Students
A free student toolkit: GPA and grade calculators, geometry, algebra, statistics and science formula tools. No sign-up, in your browser.
118 tools
Free Tools for Writers
A free writing toolkit: word and character counters, readability scores, passive voice and filler word finders, case converters. In your browser.
70 tools
Free Tools for Crypto Traders
A free crypto toolkit: profit and loss, position size, liquidation price, impermanent loss, gwei and wei converters. No wallet connect.
27 tools
Free Tools for Home Projects
A free home toolkit: paint, tile, flooring, concrete and mulch calculators, BTU sizing, rent affordability and cap rate. In your browser.
24 tools
Free Personal Finance Tools
A free money toolkit: savings goals, debt payoff, FIRE, compound interest, budgeting and salary calculators. No sign-up, in your browser.
44 tools
Free Health & Fitness Tools
A free health toolkit: BMI, TDEE, macros, heart rate zones, one rep max, running pace and body fat calculators. In your browser.
46 tools
Free Tools for Designers
A free design toolkit: color picker, palette and gradient generators, contrast checker, image resize, crop and convert. In your browser.
34 tools
Free PDF Tools
A free PDF toolkit: merge, split, compress, rotate, PDF to image and image to PDF. Everything runs in your browser, nothing uploaded.
10 tools
Free Unit Converters
A free converter toolkit: length, weight, temperature, cm to inches, kg to lbs, data storage and more. Instant, in your browser.
62 tools
Free Everyday Calculators
A free calculator toolkit: percentage, tip, loan, mortgage, age, BMI and date calculators for money, health and daily life.
94 tools
Free Tools for Marketers
A free marketing toolkit: meta tags, SERP preview, keyword density, UTM builder, hashtag and caption generators, engagement calculators.
42 tools
Free Online Generators
A free generator toolkit: passwords, usernames, QR codes, UUIDs, lorem ipsum, business names and random data. Fast and private.
20 tools
Free Network & Web Tools
A free network toolkit: CIDR and subnet calculators, URL and query string parsers, HTTP status and MIME references. In your browser.
22 tools
Free Tools for Gamers
A free gamer toolkit: mouse sensitivity and eDPI converters, FPS frame time, KD and win rate, gacha and loot drop odds, Elo rating. In your browser.
22 tools
Free Sports Stats Tools
A free sports toolkit: golf handicap, bowling score, baseball ERA and batting average, basketball shooting, powerlifting Wilks and pace calculators.
22 tools
Free Weather Tools
A free weather toolkit: heat index, wind chill, dew point, feels-like, humidity, wet bulb and cloud base calculators using standard NWS formulas.
21 tools
Free Tools for Pet Owners
A free pet toolkit: dog age by breed, dog and cat calorie and food portions, chocolate toxicity, pregnancy, and aquarium volume calculators.
20 tools
Free Size Conversion Tools
A free sizing toolkit: shoe, clothing, ring, bra, hat and jeans size converters across US, UK and EU charts, plus kids sizes by age.
21 tools
Free Tools for Photographers
A free photography toolkit: depth of field, hyperfocal distance, crop factor, field of view, exposure, sunny 16 and print size calculators.
22 tools