Developer builds 175+ browser-based tools, shares hard lessons on Google indexing

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A developer built PlainToolbox, a free collection of over 175 browser-only utilities including calculators, converters, and text tools, all running without a backend or user sign-up. The project uses a shared data-driven engine in Next.js, where each tool is defined as a single object that automatically generates its page, schema, sitemap entry, and FAQ content. Despite initial crawling, Google dropped nearly all tool pages, flagging them as 'Crawled, currently not indexed,' prompting the developer to remove generic tools, add answer-first content blocks, and avoid fake freshness timestamps. The developer noted that on a new domain, technical SEO only establishes eligibility to rank, while backlinks and real-world mentions carry far greater weight. Notably, the site's earliest traceable traffic came from AI assistants rather than traditional search, suggesting niche single-purpose pages may find an audience through that channel first.

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