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SEO Tools

Free browser-based SEO utilities for webmasters and technical SEO specialists. Sitemap diffing, URL normalization, and migration audits — all client-side.

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Sitemap Comparator

Diff two XML sitemaps in your browser. Find URLs only in A, only in B, common to both, and likely renames via similarity matching. 100% local.

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Hreflang Checker

Validate hreflang clusters in your browser. Find missing return tags, invalid ISO codes, missing x-default, and duplicate locales. Browser-only, no upload.

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Robots.txt Tester

Test URLs against your robots.txt rules per user agent. Catches longest-match conflicts, syntax errors, unknown directives, and sitemap mistakes. 100% local.

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Why Use SEO Tools?

Practical, no-nonsense SEO tools aimed at the moments that actually matter — pre-launch checks, post-migration audits, competitor crawls, redirect mapping. Everything runs locally in your browser so the URLs you paste never leave your device, which matters when you are working with pre-release content, staging environments, or client data under NDA. Built for technical SEOs, in-house webmasters, and migration consultants who want fast answers without uploading files to yet another SaaS dashboard.

Frequently Asked Questions

Why run SEO tools client-side?

Sitemaps and URL lists often include staging URLs, pre-launch content, or competitor data you do not want sitting in a third-party SaaS log. Running locally removes that risk entirely.

Will these tools fetch sitemaps from a URL?

No — browser CORS rules prevent fetching arbitrary domains. Paste XML directly or upload a saved sitemap.xml file.

What is the typical use case for the sitemap comparator?

Site migrations, redesigns, CMS swaps, locale rollouts, and competitor crawl audits — anywhere two sitemap snapshots need to be reconciled so redirects can be planned.

Do these tools work on mobile?

Yes. Layouts adapt to small screens and file pickers work from mobile browsers, though large sitemap diffs are easier to scan on a wider display.