Guides
Articles, how-tos, and deep dives to help you get more done.
- Generators
How to Create a Strong Random Password
What makes a password strong, why length and randomness matter more than complexity tricks, and how to manage passwords securely.
Password SecuritySecurityGenerators - Calculators
How to Calculate Your Age
How age is calculated from a date of birth — including why month and day arithmetic can be tricky, what leap years affect, and practical examples.
Age CalculatorDatesCalculators - Calculators
How to Calculate a Discount
Step-by-step guide to calculating discount amounts and final prices — with clear formulas and examples for common shopping and sales scenarios.
DiscountShoppingMathCalculators - Calculators
How to Calculate a Percentage
A clear explanation of percentage calculations — finding a percentage of a number, percentage increase, decrease, and difference — with worked examples.
PercentagesMathCalculators - Text
How to Remove Duplicate Lines from Text
Why duplicate lines appear, how to remove them reliably, and what to watch out for — including case sensitivity and trailing whitespace differences.
Duplicate LinesText CleanupText Tools - Text
How to Count Words and Characters
A practical guide to word counting and character counting — what each metric measures, when it matters, and the differences that trip people up.
Word CountCharacter CountWritingText Tools - Text
How to Convert Text Case
A guide to the most common text case formats — UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more — with examples and when to use each.
Case ConverterText ToolsNaming Conventions - Developer
How to Format SQL
Why SQL formatting matters, how to structure SELECT, JOIN, WHERE, GROUP BY, and ORDER BY clauses, and practical tips for writing readable queries.
SQLDatabasesDeveloper Tools - Developer
Common Regex Patterns and Examples
A practical reference of useful regular expression patterns for digits, words, emails, dates, URLs, and more — with JavaScript-compatible examples.
RegexRegular ExpressionsDeveloper Tools - Developer
Regular Expressions Explained for Beginners
A beginner's guide to regular expressions — what they are, how the syntax works, and practical examples using JavaScript-compatible patterns.
RegexRegular ExpressionsDeveloper Tools - Developer
What Is a JWT?
A clear explanation of JSON Web Tokens — their structure, what each part does, and important security considerations you need to know before using them.
JWTAuthenticationSecurityDeveloper Tools - Developer
URL Encoding Explained
What URL encoding is, which characters need to be percent-encoded, and how to safely include special characters in URLs and query strings.
URL EncodingPercent EncodingDeveloper Tools - Developer
What Is Base64 Encoding?
A plain-language explanation of Base64 — what it is, why it exists, and how it differs from encryption. Includes practical examples and common use cases.
Base64EncodingDeveloper Tools - Developer
JSON vs XML: What's the Difference?
A practical comparison of JSON and XML — syntax, readability, data structures, and when each format is commonly used.
JSONXMLData FormatsDeveloper Tools - Developer
What Is JSON?
A clear, practical introduction to JSON — its structure, data types, common mistakes, and why it became the default format for web APIs.
JSONDeveloper ToolsData Formats