#Dev Tools
100% browser-based utilities. No servers, no tracking, no limits.
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100% browser-based utilities. No servers, no tracking, no limits.
Accessible palettes and tokens in OKLCH perceptual space with WCAG AAA contrast for Tailwind CSS v4 and CSS.
Convert pixel (px) units to rems in real time.
Generate custom CSS box shadows with live preview.
Check color contrast against WCAG 2.1 standards.
Preview any URL on multiple devices with real interaction.
Convert any JSON to strict TypeScript interfaces.
Build and translate cron expressions to human language.
Build well-formatted commit messages following the specification.
Generate an optimized .gitignore for your tech stack.
Generate a professional README.md for your repository in seconds.
Decode, inspect and verify JWT tokens without sending them to any server.
Generate SHA-256, SHA-384, SHA-512 hashes from any text.
Encode and decode text in Base64 and URL-safe Base64.
Generate UUIDs v4, NanoIDs and ULIDs instantly.
Generate your AGENTS.md so AIs understand your project instantly.
Create AI agent skills with Progressive Disclosure and frontmatter.
Configure and validate Model Context Protocol servers (mcp_config.json).
Design structured system prompts for subagents (Coder, Planner, Reviewer).
Package plugins with manifests, rules, MCPs, hooks, and skills.
Calculate tokens, words, characters, and costs for GPT-4o, Claude, Gemini, and Llama.
Test regular expressions with real-time highlighting.
Generate customizable QR codes with colors, shapes and icons.