Simple developer tools
built with zero bloat
Fast, secure developer utilities that run entirely in your browser. No account registration, no paywalls, and no cookie warnings. Just clean tools and dev guides.
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Recently on the blog
Tutorials, opinions, and notes from our own work.
One Week in the AI Money Machine: $25B in Bonds, a Record IPO, and a Moratorium
Amazon raised $25 billion in bonds, SK Hynix pulled off the largest foreign US listing ever, Meta committed to doubling compute, and New York hit pause. All in the same two weeks.
GPT-5.6: What Sol, Terra, and Luna Actually Mean for Developers
OpenAI shipped GPT-5.6 as a three-tier family: Sol, Terra, and Luna. Here's the pricing, the new caching rules, and which tier your workload actually needs.
Autonomous Coding Agents Redefining Software Development
Autonomous coding tools like Claude Code and specialized environments are shifting the developer role from writing code to orchestrating logic.
Run Two Claude Code Accounts at Once (Personal + Office)
Claude Code has no account switcher yet, but one environment variable lets you keep a personal and an office login active at the same time. Here's the full setup.
React Server Components in Depth: What They Are and When to Use Them
React Server Components fundamentally change how we think about rendering. This guide breaks down how they work, how they differ from Client Components, and the patterns that will make your Next.js apps faster.
10 VS Code Extensions That Actually Make You a Better Developer
Skip the bloated extension packs. These 10 VS Code extensions have earned a permanent spot in my setup, each one solves a real problem, ships no junk, and earns its memory footprint.
Getting Started with Next.js 16: A Complete Guide
Everything you need to know to build fast, modern web applications with Next.js 16 App Router, Server Components, and TypeScript. From project setup to production deployment.
CSS Grid vs Flexbox: When to Use Each (With Real Examples)
The grid vs flexbox debate persists because developers treat them as alternatives. They're not, they solve different problems. This guide shows you exactly when to reach for each one.
Why TypeScript Generics Are More Powerful Than You Think
A deep dive into TypeScript's generic type system, from basic usage to advanced patterns like conditional types, infer, and mapped types that will make your code safer and more expressive.
The tools
Everything runs in your browser. Nothing gets uploaded.
LLM API Cost Calculator
Compare what a workload costs across Anthropic, OpenAI, Google and xAI, including prompt caching, batch rates and long-context tiers.
Token Counter & Context Visualizer
Paste a prompt or file to estimate its token count, see how much of each model's context window it fills, and what it costs to send.
JSON Parser & Formatter
Validate, format, and minify JSON data with error highlighting.
Word Counter
Count words, characters, sentences, and paragraphs in real-time. Features Unicode support, reading time, and keyword density.
Online Notepad
A free online rich text editor with file upload, download, and line numbering features. Edit text documents directly in your browser.
Email Signature Generator
Design a stunning, professional email signature in minutes, no coding required. Choose from 7 beautiful templates, add your contact details, social links, a call-to-action button, legal disclaimer, and download as a PNG image or HTML file.
Interactive QR Code Generator
Generate customizable QR codes instantly. Create URLs, text, WiFi, vCards, emails, and SMS codes with logos, colors, and SVG/PNG downloads.
Secure Password Generator
Generate strong, customizable passwords and passphrases. Check password strength, complexity, entropy, and crack time instantly.
Image Compressor
Compress, resize, and convert JPEG, PNG, and WebP images directly in your browser. Optimize image file size without losing quality.
We also build software for clients
When we’re not making free tools, we build web and mobile apps for startups and businesses. If you have a project in mind, tell us about it.
Web Application Development
Full-stack web apps built with modern frameworks like Next.js, React, and Node.js.
Mobile App Development
Cross-platform iOS and Android apps using React Native and Expo.
API Design & Development
RESTful and GraphQL APIs designed for performance, scalability, and developer experience.