About FreeWebCheck

FreeWebCheck started as a personal project in early 2026. I was building a few small sites and kept needing quick tools — check an IP, look up DNS records, audit a page for SEO issues. Every time I searched, I found either bloated tools with sign-up walls or outdated sites cluttered with ads. I figured I could build something cleaner. No accounts, no tracking, just the tool and the result.

Since then it has grown into a free, privacy-first suite of online tools for networking, SEO, image processing, and website analysis — used by developers, sysadmins, SEO specialists, and casual users alike. Everything runs in your browser or through stateless proxies. No data leaves your device unless you explicitly ask for it.

What We Offer

Networking Tools

• IP Lookup — Find your public IP, location, ISP, and ASN instantly.
• VPN Detection — Check any IP against known VPN and datacenter ranges.
• DNS Lookup — Query all record types, check DNS health (SPF, DMARC, DKIM), reverse DNS, and detect hosting infrastructure.
• IP Compare — Compare location, ISP, and connection type for multiple IPs side by side.

SEO & Web Analysis Tools

• SEO Analyzer — 20+ on-page checks, SERP preview, readability scoring, and keyword analysis.
• Page Link Analyzer — Full link profile breakdown with risk scoring and anchor text analysis.
• Website Audit — Crawl up to 25 pages across SEO, performance, security, accessibility, and content quality.

Image Tools

• Image Toolkit — Compress, convert, and resize images. Supports JPEG, PNG, WebP, and AVIF output.

Blog & Resources

• 29 in-depth articles on networking, privacy, SEO, and image optimization
• Glossary of technical terms with clear explanations
• FAQ answering common questions about IP addresses, DNS, and VPNs
• Developer guide with API examples in JavaScript, React, Node.js, and CLI

How It Works

IP lookups use ipinfo.io with ipify.org as fallback — your browser fetches data directly, nothing passes through our server. DNS queries go through Cloudflare's DNS-over-HTTPS endpoint. For SEO analysis, pages are fetched through a stateless proxy deployed on Cloudflare Workers that holds zero state — no logs, no cache, no storage. Image tools rely entirely on the browser Canvas API and jsPDF. Your images stay on your machine.

This architecture means the site can operate without a traditional backend or database. There are no user accounts, no sessions, no data to breach. Each visit is self-contained.

Technology

FreeWebCheck is built with Astro for static site generation, React for interactive components, and Tailwind CSS for styling. Maps use Leaflet with OpenStreetMap tiles. DNS resolution uses Cloudflare's DNS-over-HTTPS. The backend is a Cloudflare Worker handling SEO analysis, VPN detection, backlink scanning, and contact form routing, with rate limiting and bot detection.

The entire frontend deploys to Cloudflare Pages with a global CDN, automatic HTTPS, and brotli compression. Every request is served from the edge. There is no origin server to maintain.

Why Privacy-First

Most free online tools monetize by collecting and selling your data. IP lookup sites log every address you search. SEO tools require sign-up and track your audit history. Image compressors upload your files to their servers. I wanted an alternative that doesn't treat user data as a revenue source. If the site needs to cover costs, advertising or optional donations are the plan — not data selling. The privacy policy clearly states what data we do and don't collect, and the cookie consent banner lets you opt out of analytics entirely.

What's Next

• SSL/TLS Checker — Check certificate validity, issuer, and expiry for any domain
• HTTP Headers Checker — View response headers of any URL
• Password Strength Checker — Client-side, no data sent anywhere
• More blog content — Deep dives into network troubleshooting and real-world case studies
• Dark mode — Full theme support across all pages and tools

Privacy

We don't collect, store, or log personal data. IP lookups happen client-side via third-party APIs. SEO and website audit pages are fetched through a stateless proxy that stores nothing. Image processing is entirely in your browser — no uploads to any server. We use anonymized Google Analytics (with signals and ad personalization disabled) to understand aggregate traffic patterns. See our Privacy Policy for full details.