Ship faster. Debug smarter.
Free developer tools, guides, and references — all client-side, no signup required.
Looking for .env? Read the complete guide to environment variable files.
Developer Tools
Browse all →Client-side utilities — JSON formatter, Base64 encoder, UUID generator, and more.
References
Environment Variables
100+ environment variables across AWS, Azure, Docker, Node.js and more — with best practices and a .env validator.
process.env.dev →Programming Constants
Essential constants across JavaScript, Python, Go, Rust and more — values, types, and best practices.
constants.env.dev →Everything starts with env
Cursor
AI-native code editor built on VS Code. Features inline LLM editing, chat, and multi-file agentic coding.
Windsurf
AI-powered IDE by Codeium with Cascade, an agentic LLM coding assistant that understands your full codebase.
GitHub Copilot
AI pair programmer by GitHub. LLM-powered autocomplete, chat, and agent mode integrated into VS Code and JetBrains.
Claude Code
Anthropic's CLI-based agentic LLM coding tool. Terminal-first AI assistant for complex multi-file tasks.
Codeium
Free AI code completion tool. Fast LLM-powered autocomplete for 70+ languages across all major editors.
MCP Servers
Browse all →mckinsey/vizro-mcp
Create validated data charts and dashboards.
supabase-community/supabase-mcp
Official Supabase MCP server for AI integration.
zcaceres/markdownify-mcp
Convert files to Markdown.
datalayer/jupyter-mcp-server
MCP Server for Jupyter.
xing5/mcp-google-sheets
Google Sheets API interaction MCP server.
AI Coding Skills
Browse all →Algorithmic Art
Create algorithmic art using p5.js with seeded randomness and interactive parameter exploration.
Brand Guidelines
Apply Anthropic's official brand colors and typography to any artifact.
Canvas Design
Create beautiful visual art in .png and .pdf documents using design philosophy.
Doc Coauthoring
Guide users through a structured workflow for co-authoring documentation.
DOCX
Create, read, edit, or manipulate Word documents (.docx files).
Discounts
Browse all →AWS Activate
Up to $100k in AWS credits for startups. Apply through the AWS Activate program with your startup details.
$2k+ creditsGoogle Cloud for Startups
Over $2,000 in Google Cloud credits for eligible startups. Apply through the Google for Startups program.
$150k creditsMicrosoft for Startups (Azure)
Up to $150k in Azure credits plus free access to Microsoft tools. Apply through the Microsoft for Startups Founders Hub.
$200 creditsDigitalOcean Hatch
$200 in infrastructure credits for startups. Apply through the Hatch startup program with your company details.
Free tierCloudflare
Generous free tier including CDN, DNS, DDoS protection, and Workers. Available to everyone, just sign up.
Latest Guides
Browse all →GitHub Actions: The Complete CI/CD Guide for Developers
Master GitHub Actions CI/CD: workflow syntax, triggers, matrix builds, reusable workflows, composite actions, caching, secrets, security hardening, and performance optimization.
Git for Absolute Beginners: A Visual Guide to Version Control with GitHub and GitLab
Learn Git from scratch: cloning, branching, committing, pushing, pull requests, handling conflicts, and using VS Code and GitHub Desktop. A beginner-friendly visual guide to version control.
PostgreSQL vs MongoDB: Why Postgres Is Almost Always the Right Choice
A no-nonsense comparison of PostgreSQL and MongoDB. When to choose which, why PostgreSQL wins for 95% of projects, JSONB vs documents, hosting options with free tiers, and affiliate program details.
Cheatsheets
Browse all →Regex Cheat Sheet for Developers
A quick-reference guide to regular expression syntax: patterns, quantifiers, groups, and examples.
Git Cheat Sheet — Undo Commits, Resolve Conflicts, Rebase & Squash
Essential Git commands: how to undo the last commit, resolve merge conflicts, rebase branches, squash commits, and one-liners you always forget.
Docker Cheat Sheet
Quick reference for Docker CLI: containers, images, volumes, networking, and Docker Compose.