Show HN: Number Checker for WA – Check and Verify WhatsApp Numbers
Chrome extension lets users check WhatsApp registration status for bulk phone numbers and export results.
Number Checker for WA, a Chrome extension, launched on the Chrome Web Store to let users verify WhatsApp registration status for multiple phone numbers at once. The tool accepts bulk phone number imports and exports results to CSV, Excel, or JSON formats, per a Show HN post.
The extension is designed for scenarios where users need to quickly determine whether a set of phone numbers are registered on WhatsApp — useful for businesses validating contact lists, researchers studying messaging platform adoption, or anyone managing large phone number datasets. Users import their numbers and receive formatted output showing which are active on the service.
The creator, qwikhost, posted to Hacker News as a Show HN submission, indicating this is an early-stage tool shared for feedback and awareness. The post garnered minimal initial engagement, with no comments as of its publication on September 11.
WhatsApp bulk verification tools occupy a niche in the broader contact validation and SMS marketing infrastructure space. Similar services exist for email validation and phone number scrubbing, though WhatsApp-specific checkers remain less common. The extension's ability to export in multiple formats suggests it's positioning itself toward data analysts and marketing teams already accustomed to working with CSV or JSON pipelines.
No pricing, terms, or planned features were shared in the launch post. The extension is available on the Chrome Web Store for users interested in testing it.
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