Simple, free utilities to validate and format your phone numbers — no sign-up needed.
Validate international phone numbers in any format. Detects country codes, checks digit counts, and converts to E.164 standard. Supports 200+ countries.
See how much invalid numbers cost your campaigns. Calculate wasted spend per campaign, per month, and per year 鈥?and your potential savings with clean data.
Check if a phone number is valid for WhatsApp. Validate format, detect country codes, and learn what full WhatsApp registration detection reveals.
Free tools work for a few numbers at a time. For lists of 1,000+ contacts, use the full platform with 99.99% accuracy and results in under 5 minutes.
Try 888 Number Check