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Coming soon to the Chrome Web Store
WA Number Checker by ToolsACE

See who’s on WhatsApp

Paste or import a list of phone numbers and get a clean YES / NO table in minutes. A free Chrome extension that runs entirely in your browser.

Notify me on launchSee how it works
  • 50 free lookups a day
  • No account
  • No servers, no tracking
WA Number Checker side panel showing a YES / NO results table

How it works

Four steps. No setup, no sign-up.

  1. 01

    Open WhatsApp Web

    Log in at web.whatsapp.com as you normally do.

  2. 02

    Open the side panel

    Click the extension icon. The checker opens right next to WhatsApp Web.

  3. 03

    Paste or import

    Paste numbers, or drop a CSV / TXT file, then press Check.

  4. 04

    Get your table

    Every number comes back YES or NO. Copy it, or download CSV / Excel.

Features

Built for cleaning contact lists

Paste, import, filter

Paste a list or drag in a CSV / TXT file. Any country: use the +country code, or local numbers. Then show only YES, NO or Error rows.

Importing a CSV file and filtering results

Safe pacing

Slow, Safe and Fast presets space out lookups. Pause, resume and retry errors.

Export anywhere

Copy as a table for Sheets / Excel, or download CSV and XLSX.

7-day memory

Recent results are remembered, so the same number is never looked up twice.

Private by design

No servers, no analytics, no tracking. Lookups run through your own WhatsApp Web session, so your list stays on your machine.

Pause & resume

Stop mid-list and pick up where you left off.

Launching soon

Free to use. No account needed.

  • 50 lookups per day
  • Paste or CSV / TXT import
  • Copy, CSV and XLSX export
  • 7-day result memory
Notify me on launch

Questions

When does it launch?

Soon. It is being submitted to the Chrome Web Store. Message us on WhatsApp and we will tell you the moment it is live.

Is it free?

Yes. It is free to use, with up to 50 lookups per day.

Are my numbers uploaded anywhere?

No. We have no servers. Your numbers are checked through your own WhatsApp Web session and stay in your browser.

Can my WhatsApp account get restricted?

Checking many numbers in a short time may cause WhatsApp to restrict an account. Keep the Safe pace and the daily limit, and use the tool at your own risk.

Is it affiliated with WhatsApp?

No. This is an unofficial tool and is not affiliated with, endorsed by or sponsored by WhatsApp or Meta.

Which browsers does it support?

Chrome 114 or newer, and other Chromium browsers that support the side panel.

WA Number Checker is an unofficial tool, not affiliated with WhatsApp or Meta. Built by ToolsACE.