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Practical guides that teach the task — each one linked to the free tool that does it in one click.

How to Count Words in Any Document (5 Easy Methods)

Learn 5 easy ways to count words in Word, Google Docs, PDFs and web pages — plus a free online word counter for everythi...

Uppercase vs Lowercase: When to Use Each (With Examples)

Confused about uppercase vs lowercase? Learn exactly when to use each case in titles, headings, emails and URLs — with a...

What Is JSON? A Beginner-Friendly Explanation (With Examples)

What is JSON? Learn what JSON is, how it works, and see real examples — then validate and format your own with our free ...

How to Create a Strong Password (That You'll Actually Use)

Learn how to create strong, memorable passwords the right way — plus generate unguessable random passwords free with our...

How to Calculate BMI by Hand (Formula + Examples)

Learn how to calculate BMI manually with the simple formula, see worked examples in metric and imperial, then check your...

How to Make a QR Code for Your WiFi (iPhone & Android)

Make a QR code for your WiFi in 60 seconds: guests scan and join instantly, no typing passwords. Works on iPhone and And...

Celsius to Fahrenheit: The Formula, Worked Examples & a Trick

Convert Celsius to Fahrenheit with the simple formula (°F = °C × 9/5 + 32), see worked examples, and learn the quick est...

How to Calculate Percentage: Formulas for Every Case (With Examples)

Learn how to calculate percentage in every situation: percent of a number, percent increase/decrease, and what percent X...

How Many Ounces in a Cup? (Every Kitchen Conversion You'll Ever Need)

How many ounces in a cup? 8 fluid ounces = 1 cup. Get the full chart: cups to ounces, tablespoons, milliliters — plus th...

What Is My Exact Age? How to Calculate Years, Months & Days

What is my exact age? Learn how to calculate your exact age in years, months, and days — the borrowing method, leap-year...

How Many Days Until Any Date? The Formula, Worked Examples & Holiday Countdowns

How many days until your date? Learn the exact counting method, see it worked by hand, check today's verified holiday co...

JSON Formatter vs Validator: What's the Difference (and When to Use Each)

JSON formatter vs validator explained: what each tool does, the exact errors validators catch, when you need one or both...

What Is a Unix Timestamp? How Epoch Time Works (With Examples)

What is a Unix timestamp? Learn how epoch time counts seconds since 1970, how to read 10 vs 13-digit timestamps, the 203...

How to Read a JWT Token: Header, Payload & Signature Explained

How to read a JWT token: split it into header, payload, and signature, decode the Base64URL parts, understand every clai...

Hex to RGB: How to Convert Color Codes by Hand (With Examples)

Hex to RGB conversion explained: split the hex code into three pairs, convert each from base 16, and read any color — pl...

MD5 vs SHA-256: What's the Difference (and Which Should You Use?)

MD5 vs SHA-256 compared: digest size, speed, collision resistance, and security status — plus when each is still appropr...