Native CSS Nesting: Write Sass-Style CSS Without a Preprocessor
Nesting was one of the main reasons people used Sass. It's now part of CSS itself and works in every modern browser. The basics .card { padd...
Free tutorials & developer tools
Tech concepts, explained simply.
Clear, practical tutorials on PHP, Laravel, MySQL, JavaScript, Vue JS, Angular, REST APIs, Git and more — plus handy tools to speed up your everyday development work.
Animated examples of SQL, Laravel, PHP and JavaScript code being written and run, from Technical Simple tutorials.
0:00 / 1:00
Fresh from the blog
Latest articles
Environment Variables in Node.js Without dotenv
Configuration such as database URLs and API keys belongs in environment variables, not in code. Node.js can now load .env files itself. Load...
Async SQLAlchemy 2.0 with FastAPI and PostgreSQL
SQLAlchemy 2.0 brought a cleaner, fully typed API and first-class async support. Combined with the asyncpg driver it's a solid choice for Fa...
Idempotency Keys: Making POST Requests Safe to Retry
A client sends POST /payments , the network times out, and it retries. Did the first request succeed? Without protection, the customer may b...
Free utilities
Developer tools
Quick tools that run in your browser — nothing to install.
HTML Editor
Write HTML and preview it live, with formatting, import and export.
Open toolJSON Formatter
Format, validate, minify and sort JSON with exact error positions.
Open toolRegex Tester
Test regular expressions with live highlighting and capture groups.
Open toolCase Converter
Convert text to UPPER, lower, Title, Sentence and more in one click.
Open toolBase64 Encoder
Encode and decode Base64 with full Unicode and URL-safe support.
Open toolJWT Decoder
Inspect a JSON Web Token’s header, payload and expiry.
Open toolCron Helper
Explain cron schedules in plain English and see the next runs.
Open toolHash Generator
Generate MD5, SHA, PBKDF2 and Bcrypt hashes right in your browser.
Open toolTodo List
A simple, private task list that remembers your work between visits.
Open toolNever miss a new tutorial
Join the newsletter and get new articles delivered to your inbox. Free, and you can unsubscribe anytime.