Verify WhatsApp numbers in bulk, right inside your browser.
WABULK is a Chrome extension that connects to your WhatsApp Web session and checks whether numbers are registered on WhatsApp — in seconds. Export results as CSV or XLSX.
- ✓ No data leaves your browser
- ✓ CSV / XLSX export
- ✓ History & batch re-download
WA Number Checker - waabulk.com
+141259623896
+5512000576022
+4429375412575
Everything you need to clean your number list
Built for sales teams, marketers, and support ops who send WhatsApp at scale.
Instant verification
Uses your own WhatsApp Web session to check numbers at native speed — no third-party API in the loop.
Privacy-first
Numbers are checked locally in your browser. We never store your raw contact list on our servers.
CSV / XLSX export
One click, clean columns phoneNumber & status. Ready for your CRM or marketing tool.
Persistent history
All verification batches are saved to your account. Re-download any report at any time.
Works globally
Any country, any code. Mix formats freely — WABULK normalizes before verifying.
No limits on Pro
Free plan checks 6 per batch. Pro removes all limits for $3.9/mo on the 6-month plan.
How it works
Three steps. No APIs. No integrations.
Install the extension
Add WABULK to Chrome in one click.
Open WhatsApp Web
Scan the QR once. The extension auto-detects your session.
Paste & verify
Drop your numbers, click Begin verification, download results.
Frequently asked questions
How does verification actually work?
The extension reads your active WhatsApp Web session and queries WhatsApp's built-in contact lookup for each number. No data about your numbers leaves your browser.
Is this against WhatsApp's terms?
WABULK uses the same lookup WhatsApp Web performs when you add a contact. Use responsibly — do not use for unsolicited bulk messaging.
What format should numbers be in?
Always include the country code with a +. Example: +1234567890. The extension normalizes spaces and dashes automatically.
Can I cancel anytime?
Yes. Cancel from your dashboard — access stays until the end of your billing period.
Do you store my numbers?
Only batch metadata (totals, valid/invalid count) is stored on our servers so history works across devices. Raw numbers can be stored optionally by you per batch.
Which browsers are supported?
Chrome, Edge, Brave, and any Chromium-based browser that supports Manifest V3.
Ready to clean your list?
Install WABULK in under a minute. Free forever for small batches.
Download the Extension