All Free Online Tools
Browse 200+ free tools in 6+ categories. Search by name or pick a category to find calculators, converters, generators and checkers in seconds. No sign-up needed.
About the Kromo Tools Directory
Kromo Tools is a collection of free online tools for everyday tasks. Instead of searching the web for a different site each time you need to work out a percentage, compress a PDF or count words, you can find a tool for it here, all in one place and all in the same simple layout.
This page lists every published tool. New tools appear here as soon as they go live. Each tool has its own page that explains how it works, what the result means and which formula it is based on, so you can understand the answer and not only copy it.
Browse by Category
Prefer to start from a topic? Each category page groups related tools together with a short guide.
Math & Smart Calculators
Percentages, fractions, ratios, averages, algebra, statistics and number tools, plus money calculators such as mortgage, crypto profit and marketplace fees.
View category →Fitness & Health
BMI, BMR, calories, macros, water, protein, sleep, heart rate and workout tools for general fitness planning and tracking.
View category →PDF & Image Tools
Convert, compress, merge, split, protect and edit PDF files, and resize, crop, convert and clean up images.
View category →Daily Utility & Converters
Unit and file converters, text and word counters, QR codes, passwords, developer helpers and other everyday tools.
View category →Time & Productivity
Age and date calculators, countdowns, time zones, work hours, habit tracking and focus timers.
View category →Social Media Tools
Caption, hashtag, bio and username generators plus channel and video helpers for creators.
View category →Education & Exam
GPA and CGPA calculators, exam countdowns, study timers and school-day tools for students.
View category →How Our Tools Work
No account, no payment and no download is needed to use the tools.
Most tools run directly on your device. AI-powered tools send your input to an outside provider, so avoid entering sensitive details.
Formulas come from published sources, are tested by hand and re-checked every 90 days. See our Editorial Policy.
Health and finance results are general estimates and do not replace a doctor, accountant or other professional.
Frequently Asked Questions
Yes. Every tool listed on this page is free to use, and you do not need to create an account or sign up to use them.
Most tools run directly in your browser. A few tools, mainly the AI-powered ones, send what you type to an outside AI provider to produce a result. Please do not enter passwords, financial details or health records. You can read the details in our Privacy Policy and Disclaimer.
We build tools from published formulas, test them against manual calculations and re-check each tool every 90 days. Results are still estimates, and health and finance tools are not professional advice. Our Editorial Policy explains how we build and correct tools.
Type a keyword into the search box above, for example "pdf", "bmi" or "age". You can also use the category buttons to see one group of tools at a time and sort them from A to Z.
Send us a suggestion on the Request a Tool page. If you need something built just for you, see our Custom Tool Development page.
Cannot find the tool you need?
Tell us what you are looking for. We read every suggestion when deciding what to build next.
Need help choosing a tool?
Our quick-start guide shows how to find the right tool and use the results safely.
