CheckNumber.AI Phone Number Generator
Generate 10,000–1,000,000 locally formatted test numbers by country or segment.
CheckNumber · Free Chrome tools
Private list tools that run in Chrome.
Generate test phone numbers and email addresses, or clean existing lists with free browser-based tools. All four tools are available on the web platform; published generators are also available as Chrome extensions.
Chrome extensions and web tools
Phone Number Generator and Email Generator are now available in the Chrome Web Store. All four tools remain available on the CheckNumber web platform.
Free account required; no payment needed.
Phone Number Cleaner
Normalize, structurally validate, and deduplicate phone-number CSV or TXT files locally.
Email Generator
Generate 10,000–1,000,000 sample email addresses for forms, demos, and QA.
Email Cleaner
Remove malformed, disposable, and duplicate emails; domain routing checks are optional.
Privacy by design
The generators and Phone Number Cleaner run locally. Email Cleaner optionally queries only email domains for mail-routing records; it never sends full addresses or file contents.
How these tools work
- Install a published generator from the Chrome Web Store, or open any tool on the web platform.
- Generate a 10,000–1,000,000 record test list, or select a CSV/TXT file to clean.
- Copy or download the result. Your original file stays in your browser.
Product information updated August 2026. github.com/checkernumber