ID Card Validator

Tool Guide

About This Tool

Chinese ID Card Validator checks whether an 18-digit Chinese resident ID number is structurally valid and extracts the encoded information: birthdate, gender, and home province — useful for data validation and bulk data cleaning.

Core Features

1. Format check: Validates the region code, birthdate segment, sequence number, and checksum digit.

2. Info extraction: Parses birthdate, gender (odd sequence digit = male), and home province from valid IDs.

3. Batch validation: Accepts multiple ID numbers (one per line) and validates all at once.

How to Use

Step 1: Paste the ID numbers to validate, one per line.

Step 2: Click Validate to see check results and extracted info for each number.

Use Cases

User registration: Validate the format of ID numbers submitted in sign-up forms.

Data cleaning: Identify and flag malformed ID numbers in a database.

Statistical analysis: Extract age and gender distributions from bulk ID number datasets.

FAQ

Q: Does passing validation mean the ID actually exists?

A: No — the tool only checks that the number format and checksum algorithm are correct. It cannot verify whether the ID is real or belongs to a real person.

Q: Are 15-digit old-style IDs supported?

A: Basic 15-digit format checking is supported, but 18-digit second-generation IDs are recommended.