Why Sweating the Details Matter: Flask, port 5000, localhost, Safari and macOS
Pop quiz : Suppose you are developing a Flask app. Flask uses port 5000 as its default port. Now suppose that you have your Flask app running on mac…
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You Probably Don't Need a Server For That
You Probably Don't Need a Server for That A few months ago I needed to convert about forty HEIC photos from my phone into PNGs. The first three resu…
One version bump, 40 files to edit. Import maps fix that.
grep -rl "esm.sh/[email protected]" src/ came back with forty-one files. Forty-one places where the same CDN URL, pinned to the same version, was ty…
Why I Built Another Browser Automation Platform
Browser automation is already a solved problem. At least, that's what I thought before I started working on Figranium. There are excellent projects…
You Press Enter After Typing a URL. Here's Everything That Happens Next.
You type: https://example.com Press Enter . A few milliseconds later, the website appears. Simple, right? Not really. 😄 Behind that single Enter key…
Making a dog talk with zero backend. 🐶✨ Built an entirely client-side pipeline to animate talking pets: - ✂️ In-browser image segmentation - 👄 Real-time WebGL lip-syncing - 🎬 Native MP4 export (all in the browser) No servers, no GPU compute bills
Making a dog talk with zero backend: in-browser segmentation, WebGL lip sync and real MP4 export DEV Weekend Challenge: Dog Days Edition Submission…
Does React Break HTML Rules? Let's Find Out
Can React create HTML that the browser itself wouldn't allow? Sounds wrong, right? That's what I thought too. But while experimenting with React, I…
Debugging Complex Pointer and Touch Event Interactions in Mobile Browsers
Ever tried to build a smooth swipe or pinch gesture on mobile only to find it firing weird events, missing touches, or blocking scroll? If you’ve be…
I solved a 5 year old bug
This is a submission for DEV's Summer Bug Smash: Smash Stories powered by Sentry . Introduction Let me start by saying I am an Open-source contribut…
How Browsers Implement Native Focus Rings and Their Accessibility Implications
Ever had that moment when you tab through a form and suddenly the familiar glowing outline appears around a button or input? That subtle highlight,…
Brute forcing my way to better HTML > DOCX conversion
About 10 years ago I fell in love with Vue.js. The easy-to-learn syntax and reactivity were a joy to work with, and HMR (hot module replacement) add…
I Built a Browser From Scratch, and It Finally Renders the World's First Website Like Chrome Does
A while back I set myself a slightly unhinged goal: build a web browser from scratch in Node.js and Electron no external HTML/CSS/layout libraries,…
Prisma can now work in your browser, expo/react-native apps? — meet forge-orm
I love Prisma. I have shipped Prisma to production more times than I care to count. It changed how a lot of us write TypeScript against databases. B…
Writing unit test for Firefox private browsing window
Our indicator looks like this: an icon + a label. The browser has an indicator for when a user is in private mode. The indicator lives in two places…
You Don't Need MIDI-OX Anymore: Building a SysEx Librarian with the Web MIDI API
You Don't Need MIDI-OX Anymore: Building a SysEx Librarian with the Web MIDI API If you own a Yamaha DX7 or a Roland Juno-106, you already know the…
Browser Security Model: The Defensive Walls Every Hacker Knows (And Every Developer Should Too)
"To defend a system, you must first think like the attacker." I'll tell you this: the browser is one of the most hostile execution environments ever…
Generate MD5, SHA-1, SHA-256, and SHA-512 Hashes Instantly in Your Browser
A free, client-side tool for hashing text — no installation, no account, no server. What Is a Hash and When Do You Need One? A hash function takes a…
How Free Online Tools Survive Without Collecting Your Email
The question comes up every time someone recommends a free, no-account tool: "How does this even stay online? How are they paying for servers?" It's…
How to Build an Enterprise Browser — Branding
Originally posted on Medium In the first post I sketched out what an enterprise browser is and laid the foundation for my proof-of-concept, enterpri…
Service Worker Caching Strategies: Cache-First, Network-First, and SWR
Related: Network Optimization for SPAs and React Apps covers the broader network optimization picture including HTTP caching and API request optimiz…
Preload vs Prefetch vs Preconnect: When to Use Each Resource Hint
Related: Critical CSS: What Render-Blocking Really Means and How Inlining Fixes It covers the related optimization of eliminating render-blocking CS…
Squoosh vs TinyPNG vs ezGIF: Which Free Image Tool Should You Use?
Most people pick the first image tool that appears in a Google search, create an account when asked, and never think about it again. That's a reason…
Critical CSS: What Render-Blocking Means and How Inlining Fixes It
Related: The Browser Main Thread and Rendering Pipeline explains the full rendering pipeline that critical CSS inlining is optimizing for. Lighthous…
Why SaaS Tools Are Dropping the Login Wall in 2026
Something quiet happened to the web over the last few years. Tools that used to demand your email address before showing you anything now just... wo…
I built a browser tool that removes small daily frustrations
# Click-Line I got tired of fighting my browser, so I built this While working and browsing daily, I kept running into the same tiny frustrations: M…
WebAssembly Is Making No-Login Browser Tools Better — Here's How
Here's something that didn't happen with an announcement: the floor for what a browser can compute, without sending your data anywhere, has risen co…
Why macOS Keeps Resetting Your Default Browser (and How to Fix It Forever)
If you're a Mac user who prefers Chrome, Firefox, Brave, Arc, or any browser other than Safari, you've probably experienced this frustrating moment:…
Building a single active tab experience
I recently had a requirement where, if a user opens the app in multiple browser tabs, only one tab can be active at a time, and the rest are locked.…
April 2026 Roundup: Best New Free Tools — No Signup Required
April is one of those months where the tool discovery inbox fills up faster than usual. Partly it's spring project energy, partly it's that the no-a…