ID card format and check digit check
Check the format, birth date and check digit of an 18-character Chinese resident identity number locally in your browser. The number is not uploaded.
The number and itinerary are only processed on the current browser page, not uploaded or saved. Leaving the page will be emptied; only processed or authorized information will be processed.
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ID card format and check digit check User manual
- Fill in the parameters or select the file according to the form, and check the unit and format first.
- After entering my number, check; the result only displays the desensitization number, and does not provide number generation.
- Click the processing button to view the results, you can copy or download and save.
Calculation method and processing rules
The last digit is checked by 17 digits, and the last digit is checked, and at the same time, the date of birth of the Gregorian calendar is strictly checked.
scope of use
It is not a public security authentication, does not verify the name, area code allocation, validity period of the certificate or whether the number is real; it does not support 15 old numbers and other documents.
Will the input content be saved on the server?
This tool handles input in the browser, and does not upload files or form content. Typing practice scores are only saved in the native browser.
Why may the result be different from other tools?
It is not a public security authentication, does not verify the name, area code allocation, validity period of the certificate or whether the number is real; it does not support 15 old numbers and other documents. Please compare the input unit, rounding method, applicable rules and data version first.