How does the GST validator work?

It checks the 15-character GSTIN format, validates the state code, checks the PAN number structure, and verifies the mathematical checksum digit.

Does this connect to the official GST portal?

No. This tool performs a mathematical and structural validation of the GSTIN (checksum validation). It does not query live government databases.

Absolutely. Your data never leaves your computer. The entire validation process happens locally in your browser.

Errors will indicate if the GSTIN is too short, has an invalid state code, contains invalid characters, or fails the checksum verification.

Yes, you can process massive CSV files with thousands of rows in seconds, all within your browser.

Validate Indian GST numbers in bulk from a CSV file. Checks format and checksum. Securely process files in your browser memor

Your files never leave your device. Processed locally. 100% private.

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Complete your task perfectly in just three straightforward steps.

Upload a CSV file containing a column of GST numbers.

Select the GST column and click validate to run checksum and format checks.

Download the verified list, complete with state details and error flags for invalid GSTINs.

Everything you need to know about the GST Validator.

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