I Built 6 Free SEO Tools in One Day — Here's What I Learned
SEO tools are everywhere, but most are locked behind signups, API limits, or subscription walls. I wanted something I could actually use without friction — so I built 6 tools over a weekend and ope...

Source: DEV Community
SEO tools are everywhere, but most are locked behind signups, API limits, or subscription walls. I wanted something I could actually use without friction — so I built 6 tools over a weekend and open-sourced the approach. The Tools All run in-browser (4 client-side) or via lightweight server fetch (2 API routes). Zero external API costs. 1. Schema Markup Generator Visual form → valid JSON-LD for FAQPage, Article, HowTo, Product, Organization, BreadcrumbList. Click "Copy HTML" and paste into your <head>. One-click link to Google Rich Results Test. Why I built it: I was manually typing JSON-LD for every blog post. Now it takes 30 seconds. 2. LLMs.txt Generator Input any URL, get llms.txt + llms-full.txt following the llmstxt.org standard. Fetches your sitemap, extracts titles/descriptions, formats everything. Why it matters: AI assistants like ChatGPT and Claude check this file when users reference your site. No llms.txt = missed citations. 3. Hreflang Tag Generator Add language/URL