Website Speed Checker
Get your Google Lighthouse score, Core Web Vitals, and the biggest fixes to speed up your site. Find out why your site is slow — for mobile and desktop.
Open tool →Tools that run in your browser.
Small, fast, privacy-first utilities. Everything runs locally on your device — no sign-up, no uploads, no server. Your files never leave your machine.
Migration Cost Calculator
Estimate the cost and timeline to migrate from WordPress to Next.js. Instant budget range in USD or GBP — no email required.
Open tool →301 Redirect Generator
Paste old and new URLs, get redirect rules for Next.js, Vercel, Nginx, or Apache .htaccess. Migration-safe and SEO-friendly.
Open tool →PDF Converter
Images → PDF, PDF → images, and merge or split PDFs. Runs 100% in your browser — files are never uploaded.
Open tool →More tools coming
We're adding small, no-nonsense utilities over time — all browser-based and free. Have a request?
Suggest a tool ↗About these tools
Free, private, and built by a Next.js studio
No sign-ups, no uploads, no catch.
We're LetsCodex — a web studio that migrates businesses off WordPress and onto fast, modern Next.js sites. We build these free tools for the same reason we build great websites: to make the web quicker, safer, and less of a hassle.
Whether you're testing your site speed, estimating a migration budget, generating 301 redirects for a replatform, or converting PDFs, you get a fast, focused tool with no sign-up. Apart from the speed test (which asks Google to audit the URL you enter), everything runs locally and nothing is uploaded or tracked.
Need more than a tool? Explore our services or book a free migration audit.