Paste, import, filter
Paste a list or drag in a CSV / TXT file. Any country: write numbers with +country code, or pick a country from a searchable list (or let Auto-detect choose) for local numbers. Then show only YES, NO or Error rows.
Coming soon to the Chrome Web Store
Bulk WhatsApp Number Checker (WA Checker) by ToolsACESee 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.
- Free, 200 lookups a day
- No account
- No servers, no tracking
How it works
Four steps. No setup, no sign-up.
- 01
Open WhatsApp Web
Log in at web.whatsapp.com as you normally do.
- 02
Open the side panel
Click the extension icon. The checker opens right next to WhatsApp Web.
- 03
Paste or import
Paste numbers, or drop a CSV / TXT file, then press Check.
- 04
Get your table
Every number comes back YES or NO. Choose All, YES or NO, then copy it or download CSV / Excel.
Watch the whole flow in under a minute, from paste to export, in light and dark.
Features
Built for cleaning contact lists
Safe pacing
Slow, Safe and Fast presets space out lookups. Pause, resume and retry errors.
Export anywhere
Pick All, YES, NO or Errors, then copy the numbers or a table for Sheets / Excel, or download CSV and XLSX.
Remembers results
A YES is remembered for 7 days and a NO for 1 day, so the same number is not 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.
Light and dark
Follows your system theme. One button in the header switches, and the choice is remembered.
Launching soon
Free to use. No account needed.
- 200 lookups per day
- Paste or CSV / TXT import
- Export All, YES or NO as CSV / XLSX
- Light and dark theme
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 a daily safety limit of 200 lookups.
Can I export only the numbers that are on WhatsApp?
Yes. Above the Copy, CSV and XLSX buttons, choose YES (or All, NO, Errors) and only those rows are copied or downloaded.
Does it have a dark theme?
Yes. It follows your system setting, and a button in the header switches between light and dark and remembers your choice.
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.
Bulk WhatsApp Number Checker (WA Checker) by ToolsACE is an unofficial tool, not affiliated with WhatsApp or Meta. Read the privacy policy. Built by ToolsACE.