Free Tools
SEO & Webmaster Tools
Free, browser-based SEO and webmaster tools. Everything runs locally in your browser — no uploads, no backend, no account. Built by HELPERG for operators, founders, and webmasters.
Tools
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Each tool processes your input entirely on this page. Nothing you paste leaves your browser.
Meta Tag Checker
Extract title, description, canonical, robots, Open Graph, and Twitter tags from pasted HTML — with warnings.Open tool →Open Graph Preview
Preview generic, X/Twitter, and LinkedIn-style social cards from manual metadata input.Open tool →Robots.txt Validator
Check User-agent groups, Allow/Disallow rules, Sitemap entries, and test a path (simplified).Open tool →Sitemap Validator
Inspect sitemap XML: URL count, duplicates, invalid-looking URLs, HTTPS usage, lastmod coverage.Open tool →UTM Builder
Build campaign tracking URLs with utm_source/medium/campaign and optional term/content.Open tool →JSON-LD Validator
Check JSON-LD syntax, @context, @type, and basic fields (simplified structured-data check).Open tool →Beyond one-off checksNeed ongoing website
Need ongoing website
visibility monitoring?
These tools are great for a quick check. For continuous, owned, privacy-conscious visibility, explore WebmasterID.