About Calczy

Calczy is a free online tools platform offering 900+ calculators, developer tools, text utilities, health calculators, and unit converters. All tools run entirely in your browser for maximum privacy and speed — no signup, no download, no cost.

Our Mission

To provide the fastest, most reliable free tools on the web. No popups, no signup walls, no hidden fees. Just tools that work.

What We Offer

• Finance Calculators: SIP, EMI, compound interest, loan, mortgage, GST, and more
• Developer Tools: JSON formatter, regex tester, password generator, UUID generator, and more
• Text Tools: Word counter, case converter, text diff, find and replace, and more
• Health Calculators: BMI, BMR, calorie, body fat, ideal weight, and more
• Unit Converters: Color converter, number base, Roman numerals, time, and more
• Utility Tools: QR code generator, stopwatch, timer, dice roller, and more

Privacy First

Unlike many tool sites, all calculations on Calczy happen in your browser. Your data is never sent to a server. We don't store your inputs, and we don't require accounts. Read our Privacy Policy for details.

Free Forever

All tools are free for personal and commercial use. We're supported by advertising, not subscriptions. If you find our tools useful, please share them with others.

Contact

Have a question or suggestion? Visit our contact page or email us at contact@calczy.com.