Gemma-4
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Calculators, PDF tools, converters, text & developer utilities, generators and planners — fast, private and 100% free.

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1,391Free tools
23Categories
1,391Guides on the blog
0 ₹Cost, forever

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Finance & Loans87 toolsEMI, loan, mortgage, investment, SIP, interest, savings and personal finance calculators.Business & Marketing100 toolsProfit, margin, pricing, salary, payroll, inventory, marketing ROI and startup calculators.Health & Fitness37 toolsBMI, calorie, macro, body fat, heart rate, pregnancy and fitness calculators.Math & Statistics42 toolsPercentage, fraction, algebra, statistics, probability and number theory tools.Science & Physics18 toolsPhysics, electronics and engineering formulas: force, energy, Ohm's law and more.Unit Converters17 toolsLength, weight, temperature, area, volume, speed, pressure, energy and size converters.Date & Time28 toolsAge, date difference, countdown, time zone, working days and calendar tools.Home & Construction76 toolsPaint, tile, concrete, brick, flooring, roofing, garden and DIY material estimators.Energy & Electrical34 toolsElectricity cost, solar, inverter, battery, wire size and appliance power calculators.Auto & Travel21 toolsFuel, mileage, trip cost, EV charging, car loan and travel budget calculators.Tech & Media43 toolsScreen, storage, internet speed, camera, printing, gaming and creator calculators.Education18 toolsGPA, CGPA, grades, marks percentage, attendance and study planning tools.Lifestyle & Fun35 toolsFood, pets, events, love, zodiac, numerology and everyday calculators.PDF Tools164 toolsMerge, split, compress, convert, edit, sign, protect and analyse PDF files online.Image Tools4 toolsCompress, resize, crop, passport photo, signature and label cropper tools.Text Tools141 toolsWord counter, case converter, text cleaner, sorter, extractor and fancy text tools.Developer Tools107 toolsJSON, XML, YAML, SQL, CSS, JS formatters, encoders, regex and code generators.Security & Hashing35 toolsPassword, hash, UUID, token, cipher and encoding tools.SEO & Web22 toolsMeta tags, robots.txt, sitemap, Open Graph, headers and URL tools.Color Tools36 toolsHEX, RGB, HSL, CMYK converters, palettes, contrast checker and CSS generators.Random Generators136 toolsNames, numbers, teams, prompts, quizzes, codes and fun random generators.Planners & Checklists154 toolsPrintable checklists, planners, trackers, logs and list organizers you can save.Reference & Lookup36 toolsCountry, currency, language, time zone, emoji, Unicode and size lookups.

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Made for India & the world

₹, lakh/crore formatting, GST, Indian tax rules — plus $, €, £ with one click.

From the blog

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Free online tools for everyday work

Gemma-4 is a collection of 1,391 free online tools organised into 23 categories. Plan a home loan with the EMI calculator, check your BMI, merge or compress PDF files, convert units, format JSON, generate strong passwords or create a printable checklist — all from one website that works on mobile and desktop. Every tool comes with a detailed guide on the blog explaining how it works, the formula behind it and practical tips.