I built 80+ free browser tools — no signup, no ads, no paywalls (here's what I learned)
A few months ago I got frustrated. I needed to compress a PDF quickly. Found a tool online — it asked me to create an account first. Found another — i…
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Building a low-friction DBT skills companion for the web
I built DBT Companion, a free, mobile-friendly web app for exploring skills commonly taught in dialectical behavior therapy: https://dbt-companion.org…
A 125M model beat a 14B LLM at de-identifying medical text 40 faster, on CPU
Your data never leaves the machine - and you can check my math Building localscrub, a local-first PHI de-identification cascade, and benchmarking it h…
I built 38 free browser-only tools that never upload your files
Every time I needed to "compress an image online" or "merge a PDF", I ended up on some site that makes you upload your file to their server. For a ran…
How I built a live global scoreboard for $0 using Static HTML and Supabase published: true
I wanted to see how far I could push a $0 zero-backend stack without spinning up a server, paying for hosting, or melting a free-tier database during …
Temporize, Promise-aware debounce and throttle for TypeScript
I built Temporize because traditional debounce/throttle utilities don’t compose particularly well with async TypeScript. Every scheduled call returns …
Forget The Build Step: A Browser-Native Editor For JSX + CSS
Frontend tooling is incredibly capable. It is also often front-loaded. For many UI ideas, the first thing you do is not write code. You install, confi…
Commitea now has challenges verified against your real GitHub
A while back I shared Commitea , my project to teach Git and GitHub in Spanish, with a repo of docs and an interactive visualizer. Since then I kept a…
I built a body-doubling focus app: no camera, no booking, no signup to look around
I kept noticing that the thing stopping me wasn't what to do — I knew that. It was the act of starting. So I built Dopastep , and the whole design is …
Your MCP Tool Definition Can Be 100% Spec-Compliant and Still Not Work
Your MCP Tool Definition Can Be 100% Spec-Compliant and Still Not Work I've been building a few free browser-based tools for people working with LLM A…
Building a Pinterest Clone Solo, From Scratch, in Node.js
A few days ago I launched Vizural — "Discover visual ideas you love." It's a Pinterest-style visual discovery platform for things like home & inte…
Show DEV: Hunter Store – Full-Stack React & Node.js Game Store Template
Hey everyone, I recently built Hunter Store — a full-stack React template designed for gaming storefronts and digital products. I wanted to create som…
I made an Integer-only AI complete XOR with 99.7% accuracy all from scratch
I made an Integer only AI using Rust with my Phone. The current version v.1.0.0 is the best its ever been getting an accurcy of 99.7% and 98.7% of run…
Why I built a zero-upload, local-first browser video compressor (and why you should stop uploading your MP4s to remote servers)
As content creators, video editors, and developers, we compress files almost every single day. Whether you're exporting a 4K draft for a client, tryin…
1,756 hand drawn icons, and nobody drew them
For a while my routine on side projects was this: find one sketchy icon somewhere, download the SVG, rename it, drop it in assets , then fix its strok…
I Built an AI Assistant That Turns Natural-Language Ideas Into Stock Searches
Stock screeners are powerful, but they often require users to understand dozens of financial indicators and configure every filter manually. I wanted …
I Built a Free Invoice Generator for Freelancers — Here's What Shipping Solo Taught Me
Like a lot of freelancers, I got frustrated with the same two bad options for sending invoices: hand-formatting them in Word, or signing up for a full…
I built TryQuickImg: compress HEIC/JPG/PNG in the browser — no upload
Most free image converters ask you to upload first. Fine for a meme — less fine for a passport or exam photo. TryQuickImg https://tryquickimg.com/ Com…
StayPresent — Keep Your Python Bots Alive Without the Boilerplate 🚀
StayPresent — Keep Your Python Bots Alive Without the Boilerplate 🚀 If you've ever deployed a Discord bot, Telegram bot, or any long-running Python sc…
I built an AI observability platform with $0 – zero dependencies, zero ops, stateless
I’ve been building Cognilumin on and off for the past few months, mostly late nights and weekends. It’s a stateless AI observability platform—three to…
I built Lucius to make coding-agent sessions easier to understand
Claude Code and Codex are powerful, but longer sessions can become surprisingly difficult to follow. The terminal quickly fills with: tool calls shell…
I Built Full Team Management Into My Agency SaaS. Here's the Complete Feature Spec.
I've been building Melororium ( https://melororium.com ) — a flat-fee workspace for agencies — for about eight months. The Team section turned out to …
Fast & Lightweight Online CRC Calculator
Hi everyone, I built a simple, fast, and lightweight online CRC calculator tool for embedded systems and developers. URL: https://crc-calc.com Feature…
I Built Another React UI Library — Here's Why
If you've been building React apps for a while, you've probably had the same thought: "Not another React UI library..." Honestly, I had it too. The ec…
Hi, I'm Mr Henderson! 👋 Self-Directed Developer Joining DEV
I'm Mr Henderson, a self-directed student developer. My coding journey so far has been entirely self-taught, relying on incredible free resources like…
I built Loop – a social media platform with Co-Loops, Circles & Rewards. Looking for testers & feedback
Hey DEV community 👋 I recently shipped a side project called Loop – a social media web app I’m calling “social media reimagined.” Live link: https://l…
Introducing Volare: A Buildless 3D Model Viewer for the Web
After months of development, I’m excited to introduce Volare — an open-source, buildless 3D model viewer library built for the web using JavaScript an…
I built a UK data API platform with 37 endpoints. Here's how it works
I've been building this solo for about 14 months and just went live last week. What it is StaticCreation is an API marketplace for UK public sector da…
"I built a Python compiler that runs in browser using WebAssembly"
"I recently built PyPlayground — a free online Python compiler. The interesting part is it runs Python 3.12 entirely in the browser using Pyodide WebA…
I built an open-source, self-hostable Jira alternative — here's the stack
For the last while I've been building Spirex — a free, open-source, self-hostable alternative to Jira for agile engineering teams. It's now at a point…