Free Developer Tools

Things I built because I kept needing them. Audit SEO, scan security headers, compress images - all free, no signup.

LLM Model Comparison

Compare LLM APIs side by side: pricing, context windows, speed, and capabilities. Filter by use case and compare up to 3 models.

Paste one URL, get the full picture. Social previews, security headers, performance scores, and sitemap - all checked in seconds.

35 things to check before you launch - SEO, performance, security, auth, and legal. Track progress and don't miss anything.

See exactly how your link looks on WhatsApp, Facebook, Twitter, LinkedIn, and Google before you share it. Catch broken previews early.

Analyze any website's sitemap.xml. See all indexed URLs, path breakdown, and learn what your sitemap tells search engines.

Run a Google Lighthouse audit and get your performance, accessibility, and SEO scores with specific fixes for each issue.

Find out if your app is missing CSP, HSTS, or X-Frame-Options. Get a security score and copy-paste fixes for each header.

Generate a robots.txt (with AI bot blocking) and a Next.js metadata export - ready to copy into your project.

Compress and convert images to WebP, PNG, or JPEG. Drag & drop, adjust quality, and download - all in your browser.

Create favicons from text, emoji, or image. Get all sizes (ICO, PNG, SVG, Apple Touch) with code snippets for Next.js.

SEO, security headers, payment integration - if you don't want to tackle it alone, let's talk.