DEV Community • 2026-03-19 23:46

How to Generate Secure Passwords: A Developer Guide

Password security is one of those topics every developer knows is important but rarely gets right. In 2026, with credential-stuffing attacks running billions of combinations per day and data breaches exposing millions of accounts monthly, the difference between a weak password and a strong one is the difference between getting hacked and staying safe. This guide covers everything developers need ...

DEV Community • 2026-03-19 23:46

Architecting Multi-Tenant SaaS: Beyond the 1,000 User Pool Limit in Amazon Cognito

The "One Pool Per Tenant" Wall If you've ever built a multi-tenant SaaS on AWS, you've likely reached for Amazon Cognito. It’s the logical choice: managed, secure, and integrates deeply with the AWS ecosystem. But as your platform grows from 10 to 100 to 500 tenants, you hit a hard, non-negotiable ceiling: The 1,000 User Pool Limit. For many developers, this is the moment of panic. Do ...

DEV Community • 2026-03-19 23:46

Regex Cheat Sheet with Examples: The Complete 2026 Reference

DEV Community • 2026-03-19 23:46

JWT Token Explained: How to Decode, Debug, and Secure Your Tokens

DEV Community • 2026-03-19 23:46

HTTP Status Codes Quick Reference Guide

Every HTTP response carries a three-digit status code that tells the client exactly what happened on the server. Whether you're building a REST API, debugging a 503 on production, or just trying to understand why your fetch call failed, knowing your status codes is non-negotiable. This guide covers all five status code families — 1xx through 5xx — with plain-English explanations, real-world HTTP ...

DEV Community • 2026-03-19 23:45

Cron Expression Builder Guide: Create Scheduled Tasks Like a Pro

If you have ever needed to run a script at 2 AM every Sunday, send a report on the first business day of each month, or purge temp files every fifteen minutes, you have encountered cron. The tiny scheduling daemon that ships with every Unix and Linux system has been quietly running the internet's background tasks since the 1970s — and its five-field expression syntax remains the lingua franca of s...

DEV Community • 2026-03-19 23:43

You're not prompting it wrong.

I was listening to Grady Booch on The third golden age of software engineering episode of The Pragmatic engineer, and at one point during the episode he mentioned a website called Victorian Engineering Connections — an interactive diagram of how Victorian engineers knew and influenced each other. I was in the middle of a session with Claude, so I asked claude to remind me of the name and it point...

newest submissions : multi • 2026-03-19 23:42

Minecraft Source Code is Interesting

submitted by /u/f311a to r/programming [link] [comments]

DEV Community • 2026-03-19 23:40

How to Create QR Codes: Complete Guide for Developers and Marketers

QR codes are everywhere — on restaurant menus, product packaging, business cards, event tickets, and billboard advertisements. What started as a niche inventory tracking tool in Japanese auto manufacturing has become one of the most versatile data-encoding technologies in everyday life. Whether you're a developer integrating QR codes into an application, a marketer running a campaign, or a small ...

Newest questions tagged javascript - Stack Overflow • 2026-03-19 23:39

Why doesn't Temporal.Now.zonedDateTimeISO() work in Intl.DateFormat?

I'm working on a demo for a presentation about i18n in Javascript, Vue 3.x to be specific, and I'm trying to show that the Intl.DateFormat works with both the old Date object and the new Temporal objects. So far, Temporal.Now.plainDateISO() and Temporal.Now.plainTimeISO() work fine with Intl.DateFormat but I get a runtime error when I try to use Temporal.Now.zonedDateTimeISO() with Intl.DateFormat...

newest submissions : multi • 2026-03-19 23:37

Teen Girls Sue xAI, Alleging 'Devastating' Harm From Grok AI Child Sexual Abuse Images

submitted by /u/Haunterblademoi to r/technology [link] [comments]

DEV Community • 2026-03-19 23:37

A Developer Guide to JSON Formatting and Validation

JSON (JavaScript Object Notation) is the most widely used data format on the web. Every REST API, every configuration file, every data pipeline touches JSON at some point. Yet developers routinely lose time to formatting issues, validation errors, and syntax mistakes that are easy to avoid. This guide covers everything you need to know about working with JSON effectively — from common errors to v...

Vue.js - The progressive Javascript framework • 2026-03-19 23:35

I built an AI tool based on Vue that lets you redesign any website in real-time

Most websites look terrible. So I built (an I also am) Polish✦🇵🇱 — a free open-source Chrome extension that lets you fix and restyle any website in real-time using AI. Think “Pimp My Ride”… but for the web. You can: - force dark mode on any site - fix bad contrast, spacing, and readability issues - completely redesign a page with a simple prompt It works via real-time AI-powered DOM manipula...

DEV Community • 2026-03-19 23:35

7 Game-Changing Free Error Tracking Tools That Will Save Your Sanity in 2026

7 Game-Changing Free Error Tracking Tools That Will Save Your Sanity in 2026 Picture this: It's 3 AM, your phone buzzes with angry customer complaints, and your production application is throwing cryptic errors that you've never seen before. Sound familiar? If you're a developer who's been there (and let's be honest, who hasn't?), you know that hunting down bugs without proper error tra...

newest submissions : multi • 2026-03-19 23:31

Meta is having trouble with rogue AI agents

submitted by /u/Mathemodel to r/technology [link] [comments]

DEV Community • 2026-03-19 23:29

Hakozuna v3.2 Released: Bringing Optimized Memory Allocation to M1 Mac

I've added the main text to chatgpt5.4 ↓ I am pleased to announce the release of Hakozuna v3.2. While my previous update focused on Windows, this release marks a significant milestone: Full support for M1 Mac. GitHub Release:https://github.com/hakorune/hakozuna Zenodo Record: 19120414 DOI: 10.5281/zenodo.19120414 What is Hakozuna? Hakozuna is a memory allocator designed for small objects, bui...

DEV Community • 2026-03-19 23:27

DevToolkit vs DevToys: Which Developer Utility Suite Is Better?

Developers rely on utility tools every day — formatting JSON, encoding Base64 strings, generating UUIDs, testing regex patterns, and dozens of other micro-tasks that add up. Two popular options for handling these tasks are DevToolkit (devtoolkit.cc) and DevToys (devtoys.app). But which one actually fits your workflow better? In this comparison, we break down both platforms across features, access...

DEV Community • 2026-03-19 23:24

Building Parzero.ai: From HTML to WordPress in Minutes

Building Parzero.ai: From HTML to WordPress in Minutes 👋 About Me Hi, I’m Mohamad Darwish, a developer based in Germany. I’ve been passionate about coding since I was a kid, and recently I built Parzero.ai, an AI-powered tool that helps developers convert static HTML into clean, editable WordPress structures — saving hours of manual work. 💡 The Problem Every de...

DEV Community • 2026-03-19 23:24

DevToolkit vs CyberChef: Developer Tools Comparison

When developers need to encode, decode, format, or transform data, two names frequently come up: DevToolkit and CyberChef. Both are browser-based and free, but they take fundamentally different approaches to developer tooling. This comparison will help you decide which one fits your workflow. Overview: Two Different Philosophies DevToolkit DevToolkit is a modern developer ut...

DEV Community • 2026-03-19 23:20

CSS Minification: Why It Matters and How to Do It

CSS minification is one of the simplest performance optimizations you can make. It takes seconds to implement and can shave 20-50% off your CSS file sizes. Yet many developers skip it, especially on smaller projects. This guide explains what CSS minification does, why it matters for performance, how minifiers work under the hood, the best tools in 2026, and advanced optimization strategies beyond...