Free online tools that just work.
Free, fast, private online tools for everyday problems — no sign-up, no clutter. Every tool runs entirely in your browser with secure Web Crypto — nothing is ever uploaded, stored or tracked.
All tools, by category
32 tools and counting — free forever.
Generators & Security
- Password Generator
- QR Code Generator
- Random Number Generator
- UUID Generator
- SHA-256 Hash Generator
- Password Strength Tester
- Color Palette Generator
Calculators
- Percentage Calculator
- Discount Calculator
- Tip Calculator
- BMI Calculator
- Age Calculator
- Date Difference Calculator
- Compound Interest Calculator
- Mortgage Calculator
- Loan Calculator
Guides & learn
Simple explanations that make tech less confusing.
How to create a strong password (2026 guide)
Why length beats complexity, how password managers work, and why you should never reuse a password.
Read guide →What your BMI really means (and its blind spots)
Reading the BMI scale honestly, and knowing when the number doesn't tell the full story.
Read guide →Compound interest, explained simply
How 'interest on interest' quietly grows your savings — and how compounding frequency matters.
Read guide →QR codes: how they work & how to use them safely
What's inside a QR code, how to make one, and the scams to watch out for.
Read guide →How password strength is really measured
Entropy, crack time and why 'Password1!' is weaker than you think.
Read guide →Time zones, UTC and DST — the 5-minute explainer
How time zones actually work, why UTC exists, and how to convert times across the world without mistakes.
Read guide →HEX vs RGB vs HSL: color codes for developers
What #6366f1 actually means, when to use RGB, and why HSL is often the smartest choice.
Read guide →How to calculate percent off: the simple math behind sale prices
Discounts, double discounts and the mental-math trick that saves you from paying full price.
Read guide →How to count days between two dates (and why it's trickier than it looks)
The calendar math behind 'days between' — leap years, inclusive counting and the off-by-one trap.
Read guide →Loan amortization explained: how your EMI is really calculated
Why early payments are mostly interest, how banks compute your EMI, and the prepayment shortcut that saves thousands.
Read guide →