ValidNum - Bulk WhatsApp Number Validator & Checker
Bulk WhatsApp number verification tool. Validate phone lists, filter by country, identify business accounts, and export results to Excel or CSV.
100%
Client-Side Privacy
130/min
Max Verification Speed
0
External Data Leakage
1-Click
Excel & CSV Export & Copy Data
Free & UnlimitedPrivacy-First (Local)Chrome Web Store Complian
Stop Messaging Invalid WhatsApp Numbers
Manual verification wastes time and risks account health. ValidNum automates bulk checking safely inside your browser.
Before
- Sending messages blindly to unregistered phone numbers
- Wasting resources on invalid leads and dead contact lists
- No overview of WhatsApp Business accounts vs personal profiles
After
- Instant 1-click verification for thousands of numbers
- Clean, country-filtered lists exported directly to Excel or CSV
- Automatic detection of WhatsApp Business accounts and duplicates
Engineered for Sales & Marketing Teams
All the tools you need to validate phone lists, organize leads, and streamline outreach.
Bulk Number Verification
Validate large lists of phone numbers in seconds using your own WhatsApp Web session
Business Account Detection
Identify WhatsApp Business accounts instantly to target professional leads effectively.
Country Filtering & Deduplication
Filter results by country code and automatically eliminate duplicate entries before checking.
1-Click Data Export
Export verified results with statuses, country tags, and business flags directly to Excel (XLSX) or CSV or Copy Data.
Verify Any Phone List in 3 Simple Steps
Clean your contact lists with zero technical setup.
1
Upload or Paste Numbers
Drag and drop your CSV/XLSX file or paste raw phone numbers directly into the input area.
2
Select Speed & Start
Choose your preferred checking speed (Safe, Balanced, or Fast) and launch the verification.
3
Filter & Export
Filter valid WhatsApp numbers by country or business status and download your clean Excel/CSV file.
High-Performance Validation Dashboard
A clean, intuitive interface integrated seamlessly with WhatsApp Web.
The Problem & The ValidNum Solution
Checking phone numbers manually on WhatsApp is slow and inefficient. ValidNum handles bulk checking locally and safely.
The Problem
- Checking raw phone lists manually on WhatsApp is slow, tedious, and risks account flags.
- Unverified contact lists contain dead leads, invalid numbers, and unknown account types.
- Uploading phone data to third-party cloud tools exposes sensitive lead lists to privacy leaks.
The Tool Solution
- Automate bulk verification inside your browser with safe rate controls and custom checking speeds.
- Instantly filter valid numbers by country code, identify Business accounts, and strip duplicates.
- Process 100% locally on your machine—your phone numbers never leave your device or reach external servers.
Your Contact Data Stays Yours Only
ValidNum operates strictly locally within your browser sandbox to ensure your contact lists remain private.
100% Local Processing
Your phone lists stay local. No external servers collect, process, or store your numbers.
Zero Data Harvesting
We do not collect, sell, or monitor your contact lists, verification history, or activity logs.
Account Safety Controls
Built-in safe delays and auto-pause features protect your account from rate limits.
Why Choose ValidNum Over Old Tools?
A stark look at local privacy-first verification versus risky external cloud checkers.
Frequently Asked Questions
Everything you need to know about ValidNum.
Ready to Clean Your WhatsApp Phone Lists?
Automate bulk number verification, filter by country, and export clean Excel lists in seconds.
Explore More Extensions
Explore more powerful extensions to supercharge your browser