# Bulk Domain Checker > Check the availability of hundreds of domain names at once — instantly find what is registered and what is free. ## About Bulk Domain Checker is a Chrome extension that lets you paste a list of domain names and instantly check whether each is available for registration. It solves the frustrating process of checking domains one at a time on registrar sites. Startups, SEO professionals, domain investors, and brand strategists use it to quickly find available names across multiple TLDs without manual lookups. ## How It Works Open the extension popup and paste or type a list of domain names — one per line. Click Check and the extension queries DNS records for each domain in parallel, flagging available names instantly. Results load as they come in so you don't wait for the full list. Filter to show only available domains and export to CSV for your records. ## Install - Chrome Web Store: https://chromewebstore.google.com/detail/achelnonefebpapficmoldoanenogonh ## Key Features - Check hundreds of domain names for availability in bulk - Supports all major TLDs (.com, .net, .org, .io, .site, .co, etc.) - Color-coded results: green for available, red for taken - Export results as CSV with availability status and check timestamp - WHOIS summary for registered domains (registrar, expiry date) ## Use Cases - Startups validating brand name availability before incorporating - SEO agencies checking expired domains for backlink authority - Domain investors scanning for undervalued available names - Marketing agencies checking brand consistency across TLD variants - Developers registering project domains quickly at launch - Entrepreneurs checking availability for a product name shortlist - Niche site builders finding keyword-rich domain names at scale - Agencies checking client trademark terms across all TLDs ## Blog - https://bulkdomainchecker.site/blog/best-domain-checker-tools - https://bulkdomainchecker.site/blog/best-domain-registrars-2026 - https://bulkdomainchecker.site/blog/bulk-domain-age-checker - https://bulkdomainchecker.site/blog/bulk-domain-lookup-whois - https://bulkdomainchecker.site/blog/bulk-domain-ssl-checker - https://bulkdomainchecker.site/blog/bulk-tld-comparison - https://bulkdomainchecker.site/blog/check-domain-authority-bulk - https://bulkdomainchecker.site/blog/check-domain-availability-bulk - https://bulkdomainchecker.site/blog/check-domain-dns-records - https://bulkdomainchecker.site/blog/check-domain-history - https://bulkdomainchecker.site/blog/domain-checker-for-affiliate-marketers - https://bulkdomainchecker.site/blog/domain-checker-for-agencies - https://bulkdomainchecker.site/blog/domain-checker-for-investors - https://bulkdomainchecker.site/blog/domain-checker-for-seo - https://bulkdomainchecker.site/blog/domain-checker-for-startups - https://bulkdomainchecker.site/blog/domain-expiry-monitoring - https://bulkdomainchecker.site/blog/domain-flipping-guide - https://bulkdomainchecker.site/blog/domain-name-brainstorming - https://bulkdomainchecker.site/blog/domain-name-generator-tips - https://bulkdomainchecker.site/blog/domain-name-legal-guide - https://bulkdomainchecker.site/blog/domain-name-trends-2026 - https://bulkdomainchecker.site/blog/domain-valuation-guide - https://bulkdomainchecker.site/blog/find-cheap-domain-names - https://bulkdomainchecker.site/blog/find-expired-domains - https://bulkdomainchecker.site/blog/find-premium-domains ## Contact - Website: https://bulkdomainchecker.site - Support: support@regios.org