ValidNum - Bulk WhatsApp Number Validator & Checker

ValidNum is a fast, reliable, and privacy-focused Chrome extension designed for sales teams, marketers, and businesses needing to clean and verify WhatsApp contact lists. Effortlessly validate bulk phone numbers, detect WhatsApp Business profiles, filter contacts by country, and export verified leads—100% locally from your browser. Checking phone numbers manually on WhatsApp is slow and inefficient. ValidNum automates the entire validation process through your active WhatsApp Web session without uploading your data to external servers. 🚀 Key Features & Capabilities ⚡ Bulk WhatsApp Number Verification • Mass Validation: Upload raw contact lists via CSV, XLSX, or TXT files, or simply paste numbers directly. • Auto-Deduplication: Automatically removes duplicate phone numbers from your list before checking. • File Drag & Drop: Quick and seamless file imports with ready-to-use template downloads. 🏷️ Business Account & Country Filtering • Business Detection: Instantly identifies whether a registered number is a standard profile or a WhatsApp Business account. • Country Code Filter: Organize and filter your verified lists dynamically based on specific country codes. ⏱️ Safe & Flexible Verification Speeds • Safe Mode (26/min): Maximum safety with deliberate pacing, ideal for fresh accounts and large lists. • Balanced Mode (60/min): Recommended steady speed with randomized human-like delays. • Fast Mode (130/min): High-throughput speed for rapid validation of short phone batches. 📊 Clean Data Export & Management • 1-Click Export: Export verified leads complete with status tags, country info, and business flags directly to Excel (XLSX) or CSV. • Check History & Drafts: Saves previous validation sessions locally so you can resume anytime. 🌐 60+ Multilingual Support • Global Accessibility: Full UI support localized for over 60 languages including English, Arabic, Spanish, French, German, and Japanese. 📖 How to Use ValidNum Open WhatsApp Web (web.whatsapp.com) and log into your account. Launch ValidNum from your Chrome toolbar. Import your phone numbers (upload a CSV/XLSX file or paste raw numbers). Select your preferred checking speed (Safe, Balanced, or Fast) and click "Start Check". Filter your valid results by country or business status and export directly to Excel or CSV. 🔒 100% Local Privacy & Security • Client-Side Processing: All number verification occurs strictly inside your local browser sandbox via your WhatsApp Web session. • Zero Data Collection: Your contact lists and phone numbers are never collected, stored, or transferred to external servers. • Account Safety Protection: Built-in safety delays and automatic pause functionality prevent rate-limit flags. ⚠️ Legal Notice / Disclaimer ValidNum is an independent browser extension developed to provide contact list management features for WhatsApp Web users. ValidNum is not affiliated with, authorized, endorsed, sponsored, or maintained by WhatsApp LLC, Meta Platforms, Inc., or any of their affiliates or subsidiaries. WhatsApp™ is a registered trademark of WhatsApp LLC. 🛠️ ABOUT DEVAINER EXTENSIONS Built by Devainer Extensions. We create clean, lightweight browser utilities engineered to optimize your social media workflows and automation with a strict commitment to local privacy.