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Exposure checker for seeing whether a password or email appears in known breach data.

Breach exposure lookup service for checking whether an email appears in known breach datasets.

Dead Link Checker checks website availability, outages, broken links, or service status from the web.

Online Broken Link Checker checks website availability, outages, broken links, or service status from the web.

Checker for seeing whether an email appears in the historical Ashley Madison breach dataset.

Checker for seeing whether a phone number or profile appears in Facebook-related breach data.

Cybernews checker for seeing whether an email or phone appears in known data leaks.

OSINT search platform for finding emails, domains, files, leaks, and public records across sources.

Broken Link Checker is a browser extension or add-on that improves everyday web browsing workflows.

Broken Link Checker crawls websites to find broken links, redirects, and technical SEO issues.

Checkbot SEO checker checks page speed, performance, technical issues, and web quality signals.

Contrast Checker is a developer resource for coding, documentation, communities, security research, or software tools.

HTTP redirect checker for testing status codes, redirect chains, and response headers.

Lighthouse Rich Result Checker helps create or test structured data, schema markup, and rich-result eligibility.

Link Checker is a web guide or update reference covering changes, screenshots, notices, or community notes.

Proxy Checker helps find, check, or use proxy services for alternate web access and privacy testing.

Server-side Rendering (SSR) Checker crawls websites to audit SEO, accessibility, performance, and technical page issues.

Userscript for W.A.R. Links Checker Premium, adding browser customization or automation to supported websites.

XML Sitemap Checker helps generate, validate, or manage XML sitemaps and robots files for search indexing.

Personal-data removal with exposure monitoring and tools intended to limit future identity leaks.

Checks whether a phone number or email appears in Facebook-related data exposure collections.

Leak-awareness search page for checking whether identifiers appear in exposed datasets.

Public breach-awareness service for checking whether an email address appears in known data breaches.

Mozilla service that checks email addresses against known breaches and explains protective steps.