Phone Number Generator
Generate 10,000–1,000,000 local-format test phone numbers.
Open free tools
NumberChecker.AI · Free Chrome tools
Clean your contact lists in Chrome.
Use free local-first tools to create sample data or prepare a list. Files are processed in the extension and are never uploaded.
Chrome extension users: use the web tools while listings are pending
While the Chrome extensions are awaiting publication, use the same tools directly on the platform.
Phone Number Cleaner
Normalize, structurally validate, and deduplicate phone files locally.
Open free tools
Email Generator
Generate 10,000–1,000,000 sample email addresses for QA and demos.
Open free tools
Email Cleaner
Remove malformed, disposable, and duplicate emails locally.
Open free tools
How data is handled
Generators and Phone Number Cleaner do not make network requests. Email Cleaner’s optional mail-routing check queries only an email domain, never full addresses or file contents.
How these tools work
- Install the tool from the Chrome Web Store when its listing is available.
- Generate a 10,000–1,000,000 record test list, or choose a CSV/TXT file to clean.
- Copy or download the result. Your source file stays in your browser.
Product information updated August 2026. github.com/numberchecker-ai
