How to validate contact lists before bulk WhatsApp broadcasting without bans?

FiltraZap scrubs thousands of numbers in the cloud without scanning a QR code or using your SIM card. Eliminates invalid contacts before broadcast via Evolution API, Z-API, or Official Meta API, guaranteeing 99.9% deliverability and Zero Ban risk.

How does FiltraZap verify bulk WhatsApp numbers?

FiltraZap processes your contact list (CSV, Excel, or TXT) via secure cloud verification protocols. It checks if each phone number has an active WhatsApp account and delivers a clean, ready-to-use dataset.

Is bulk validation safe? Can my sender phone number get banned?

100% safe. FiltraZap employs intelligent session isolation and Smart Rate-Limiting architecture, protecting your channels and ensuring zero risk of ban.

Which file formats are supported for import?

You can upload Excel (.xlsx, .xls), CSV (.csv), or Text (.txt) files. The system automatically detects the phone column and preserves all original data columns.

Can I test FiltraZap for free before subscribing?

Yes! Upon registration, you receive free trial credits to test real-time validation directly in your dashboard.

What is the average processing speed for contact lists?

The system verifies thousands of numbers per minute powered by USync Batching parallelism, allowing you to audit lists of up to 50,000 contacts in minutes.