IMEI Validator
Check a 15 digit IMEI with the Luhn check digit, compute the missing check digit for a 14 digit IMEI, or validate a whole list at once. The last digit of an IMEI is a check digit — if the Luhn sum fails, the number has a typing error.
Per-digit Luhn breakdown
| Position | Digit | Operation | Value used | Running total |
|---|
Starting from the rightmost digit, every second digit is doubled (9 is subtracted if the doubled value is above 9). The IMEI is valid when the total is a multiple of 10.
| # | IMEI | Status |
|---|
How to use
- Validate one IMEI: type the 15 digit number and press Validate IMEI to see the Luhn breakdown table.
- Compute check digit: type the first 14 digits to get the correct 15th digit.
- Batch mode: paste many IMEIs, one per line, and validate them all in one click.
Important notes
- This tool only checks the number structure. It cannot tell you if a phone is stolen, lost, or blacklisted — ask your mobile network operator for that.
- A failed Luhn check almost always means a typing error: retype the number carefully.
- IMEIs are printed on the phone box, under the battery or battery cover, or shown by dialing *#06# on the phone.
Frequently Asked Questions (FAQ)
What does this IMEI validator do?
It checks whether a 15 digit IMEI is valid using the Luhn check digit formula, computes the missing check digit for a 14 digit IMEI, and can validate many IMEIs pasted at once in batch mode.
What is the Luhn check digit in an IMEI?
The last digit of a 15 digit IMEI is a check digit calculated with the Luhn formula over the first 14 digits. If the full 15 digit number fails the Luhn check, the IMEI contains a typing error.
Can a valid IMEI still be stolen or blacklisted?
Yes. This tool only verifies the number structure. It cannot tell you if a device is stolen, blacklisted, or reported lost. Check that with your mobile network operator.
Is the IMEI validator free?
Yes, the IMEI validator is completely free to use with no signup. Everything runs in your browser.