✅ WhatsApp Number Validator

WhatsApp Number Validator — Check & Clean Your Contact List

Before sending bulk WhatsApp messages, validate your contact list. Postabi's WhatsApp number validator checks which numbers have WhatsApp, saving you from failed deliveries.

Number Validation

Why Validate WhatsApp Numbers Before Sending?

Sending messages to numbers without WhatsApp wastes time and money. Our validator checks each number against WhatsApp's database to ensure deliverability before you send.

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Bulk Number Check

Upload CSV or Excel files with thousands of numbers. Our validator checks each one for WhatsApp presence.

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Detailed Results

Get valid/invalid counts, export clean lists, and download detailed reports for each number checked.

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Save on Failed Messages

Don't waste money sending to invalid numbers. Validate first, send only to WhatsApp-active numbers.

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Fast Processing

Check thousands of numbers in minutes. No manual work — fully automated validation engine.

💬 Validate Numbers — Contact Us

How It Works

Validation Process

Upload Your List

CSV, Excel, or copy-paste numbers. Format with country code (e.g., 923001234567).

Run Validation

Our system checks each number against WhatsApp's presence indicators.

Get Results

Download a clean, validated contact list. Separate files for valid and invalid numbers.

Send with Confidence

Import the clean list into Postabi and send messages — all recipients have WhatsApp.

Features

Validator Features

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Batch Upload

Upload up to 100,000 numbers at once. Supports CSV, XLS, and XLSX formats with automatic column detection.

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International Support

Validates numbers from any country. Automatic country code detection and formatting correction.

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Export Clean Lists

Download validated numbers ready for import into Postabi or any WhatsApp broadcasting tool.

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Validation Reports

Detailed reports showing total numbers, valid count, invalid count, and processing time.

💬 Validate Your List — WhatsApp Us

FAQs

Validator FAQs

Is number validation 100% accurate?

Our validator has 95%+ accuracy in detecting WhatsApp presence. However, no method is 100% foolproof as WhatsApp doesn't provide a public "has WhatsApp" API.

Does validation cost extra?

Number validation is included with Postabi's Web API subscription at Rs.3,000/month. Free validation for up to 10,000 numbers/month. Contact us for higher volumes.

What number format should I use?

Use international format without the + sign. For Pakistan: 923001234567. For other countries: country code + number (no leading zero, no +).