About Fernandes Labs

Who we are

Fernandes Labs is a small team of developers, designers, and technical SEO specialists who build fast, reliable, free online tools. We started this project with a simple observation: most developer utilities on the web are slow, loaded with trackers, or hidden behind sign-up walls. We believe a free tool should be instant to load, private by default, and genuinely useful — so we built our own network of 132+ tools and the guides that go with them.

Our mission

Our mission is to make technical SEO and developer tooling accessible to everyone. Whether you are a student learning how DNS works, a marketer auditing a redirect chain, or a senior engineer debugging a production incident, you should be able to open a tool and get the answer in seconds — without creating an account, without watching your data leave the browser, and without paying a subscription. If a tool needs to be explained, we write the guide ourselves instead of pointing you elsewhere.

What we build

The network spans eight categories: developer utilities like the JSON Formatter and Regex Tester, SEO tools like the Redirect Checker, Canonical URL Checker, and Robots.txt Generator, network diagnostics like IP Lookup and DNS Lookup, plus media, finance, and text tools.

Almost every tool runs entirely in your browser using modern Web APIs, which is what makes them safe for sensitive data such as API keys, passwords, and private documents. The six network tools are the deliberate exception: Ip Lookup, Dns Lookup, Ssl Checker, Ping Tool, Redirect Checker and Http Header Checker have to send the address or URL you enter to our server, because browsers block those cross-origin requests outright. Those lookups are proxied without being stored or logged, and the privacy policy spells this out in full.

How we work

Every tool ships with hand-written documentation, real input-to-output examples, and answers we verify against the current standards — RFCs for network protocols, WCAG for accessibility tools, and Google's own documentation for SEO tools. The project is funded by clearly labelled ads and nothing else — there are no affiliate links and no paid placements, and we never sell data. We publish how the site works in our open documentation and review every piece of feedback we receive — bug reports, tool ideas, and corrections all shape the roadmap.

Contact

Questions, bug reports, or an idea for a new tool? Email us at fernandeslabssupport@gmail.com or open an issue in the Fernandes Labs GitHub repository — we read everything.