Optimise SEO with Free Online Tools

On-page SEO requires getting a surprising number of technical details right: meta title and description lengths, Open Graph tags for social sharing, structured data markup for rich results, keyword density balance, and title/description preview accuracy. devtoolkit.sh brings all the SEO tools a developer or content team needs into one place. Generate a complete set of meta tags including OG and Twitter Card tags. Create valid JSON-LD schema markup for articles, products, FAQs, and other page types. Check keyword density to avoid over-optimisation. Preview how your title and description will look in search results with accurate character counts. All tools run in your browser — no API keys, no limits, no signup.

FAQ

What is the ideal meta description length?
Google typically displays 150–160 characters of a meta description in search results. The Title Description Checker shows a live preview so you can optimise for the visible length.
Does schema markup improve rankings?
Schema markup is not a direct ranking factor, but it enables rich results (star ratings, FAQs, prices) in SERPs, which significantly improves click-through rates.
How do Open Graph tags help?
Open Graph tags control how your page appears when shared on Facebook, LinkedIn, and other platforms — determining the title, description, and preview image that users see.