Next.js proxy.ts: Redirects, Auth Checks and Rewrites at the Edge of Your App
Sometimes you need to act on a request before any page renders: redirect signed-out users, rewrite a path, or add a header. In Next.js 16 th...
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
Validating Runtime Data with Zod and TypeScript
TypeScript checks your code, not your data. A JSON response, a form submission or an environment variable can be anything at runtime. Zod va...
Modern CSS Colour: oklch(), color-mix() and Relative Colours
#hex and rgb() describe colours the way screens produce them, not the way people see them. Newer CSS colour functions make palettes more con...
Worker Threads in Node.js: Running CPU-Heavy Work in Parallel
Node.js runs your JavaScript on a single thread. That's fine for I/O, but a CPU-heavy task (resizing images, parsing a huge file, heavy math...
Free utilities
All tools Developer tools
110 quick tools that run in your browser — nothing to install.
JSON Formatter
Format, validate, minify and sort JSON with exact error positions.
Open toolBase64 Encoder
Encode and decode Base64 text and files, with full Unicode and URL-safe support.
Open toolHash Generator
Generate MD5, SHA, PBKDF2 and Bcrypt hashes right in your browser.
Open toolPassword Generator
Create strong random passwords or passphrases with entropy and crack-time estimates.
Open toolHTML Editor
Write HTML and preview it live, with formatting, import and export.
Open toolRegex Tester
Test regular expressions with live highlighting and capture groups.
Open toolColor Palette Generator
Generate harmonious colour palettes and export them as CSS variables, SCSS or JSON.
Open toolImage Compressor
Shrink JPG, PNG and WebP images in your browser with a quality slider and before/after sizes.
Open toolQR Code Generator
Create QR codes for links, text, Wi-Fi, contacts, email and SMS; download PNG or SVG.
Open toolPDF Merger
Combine several PDFs into one, in the order you choose — all in your browser.
Open toolcURL to Code
Convert cURL commands into fetch, Axios, Python requests, PHP, Go and Node.js code.
Open toolCron Helper
Explain cron schedules in plain English and see the next runs.
Open toolNever miss a new tutorial
Join the newsletter and get new articles delivered to your inbox. Free, and you can unsubscribe anytime.