29 Free Developer & SEO Tools
Free Developer & SEO Tools
A free, interactive toolkit for Next.js developers, technical SEO and web security. Convert, generate and preview right in your browser.
✓ 100% free✓ Runs in your browser (privacy-friendly)✓ Next.js & TypeScript ready
Development & Coding
Code converters, generators and config builders for modern TypeScript projects.
- cURL to Modern FetchConvert cURL requests into Next.js 15+ Server Actions, Route Handlers and Fetch code.
- JSON to TypeScript & ZodTurn JSON data into type-safe TypeScript models and Zod validation schemas instantly.
- MCP Config BuilderBuild ready-to-use MCP server configurations for Claude Desktop, Cursor and Windsurf.
- AI Function Calling BuilderBuild type-safe tool and function schemas for OpenAI, Claude and the Vercel AI SDK.
- .cursorrules GeneratorGenerate professional architecture rules for Cursor, Claude Code and Windsurf in seconds.
- Vercel AI Boilerplate BuilderGenerate working API routes and React components for Next.js 16 and the Vercel AI SDK.
- AI Mermaid Diagram GeneratorTurn architectures, ERDs and workflows you describe in plain language into live Mermaid diagrams.
- AI Regex & Cron GeneratorTurn plain-language requests into Regex or Cron expressions instantly and test them interactively.
- Dockerfile & Docker Compose BuilderGenerate Dockerfiles and compose templates for Next.js, Bun, Rust, .NET 9, Mongo, MySQL, RabbitMQ, MinIO and Nginx.
- AI Git Commit & PR GeneratorGenerate a Conventional Commits message and a GitHub PR template from git diff output.
- API Mock & Schema StudioGenerate mock API data and TypeScript models from OpenAPI 3.1 and JSON Schema.
AI & Assistants
AI assistants, prompt tools and model comparisons.
- AI RAG Chunking VisualizerChunk RAG documents and visualize overlaps and embedding cost.
- AI ChatAn AI assistant that answers from the site's blog posts, projects and experience.
- AI AgentAn AI assistant with advanced model options and personalized context.
- AI Model ComparisonSearch the model catalog and calculate live token costs and benchmark scores.
- AI Prompt OptimizerImprove your prompts for autonomous agents, image generators and coding models.
- AI Image GeneratorGenerate images from text for blog covers, presentations and social media.
- AI Model ArenaSend the same prompt to 2–3 models at once and compare answers, time to first token, token usage and cost side by side.
- AI Prompt Injection TesterTest your system prompt against prompt injection and hidden-context leak attacks and get a resilience score.
SEO, Data & Infrastructure
Structured data, crawler control, share previews and security headers.
- JSON-LD Schema & Rich SnippetsGenerate valid Schema.org JSON-LD for Google rich results and AEO.
- OpenGraph & Meta PreviewPreview Google SERP, X (Twitter), LinkedIn and WhatsApp cards live.
- robots.txt & AI Bot ControlManage robots.txt rules for crawlers such as Googlebot, GPTBot and ClaudeBot.
- llms.txt & AI Crawler GeneratorGenerate /llms.txt and /llms-full.txt files for ChatGPT Search and Perplexity.
- AEO & LLM SEO AuditorAnalyze how well your website is optimized for ChatGPT Search and Google AI Overviews.
- AI SQL & Postgres OptimizerTurn plain-language requests into optimized Postgres/Neon SQL queries and pgvector indexes.
- Core Web Vitals OptimizerAnalyze a live URL with PageSpeed and open the fix list for weak LCP, INP, CLS or TTFB automatically.
- Website Uptime MonitoringAn introduction to website, API, SSL, domain, ping and port monitoring (UpScanX).
- SPF, DKIM & DMARC CheckerLook up your domain's SPF, DKIM, DMARC and MX records live and generate records that meet Gmail, Yahoo and Outlook rules.
- Security Headers & CSPGenerate CSP, HSTS and A+ HTTP security headers for Next.js 15+, Nginx and Cloudflare.
More tools with a Turkish interface
1 more tools, including the AI-powered ones, are available in Turkish for now.
Frequently Asked Questions (FAQ)
Yes. Every tool on this page is free and ad-free, and you can use it directly in your browser without signing up.
No. These tools run on the client side in your browser. Your API keys and source code are not saved or logged on our servers.
Yes. The tools produce output for modern web standards (Next.js 15+ App Router, React 19, TypeScript). Copy it with one click and paste it into your project.
Yes. More tools, including the AI-powered ones, are available with a Turkish interface on the Turkish tools page. They are being translated step by step.