GST Number Validator
Check GSTIN format and check digit.
🔒 Checked only in your browser; nothing is sent or saved. This checks the format and check digit, not whether the number is actually issued or active. Verify on the official government portal.
How to use
- 1Type or paste the 15-character GSTIN.
- 2See instantly whether the format and check digit are valid.
- 3Read the state, PAN and business type it contains.
- 4Confirm registration status on the GST portal.
Frequently asked questions
What does a GSTIN contain?
2-digit state code, the 10-character PAN, an entity number, the letter Z and a check character.
Does valid format mean the GSTIN is real?
No. It only means it's correctly formed. Search it on gst.gov.in to confirm it's registered and active.
How can this catch typos?
The last character is calculated from the first 14, so most single mistakes make it fail.
Why check a supplier's GSTIN?
You can claim input tax credit only on invoices with a valid, active GSTIN, so checking avoids lost credit.
You may also need
PAN Card Validator
Check PAN format and holder type.
Aadhaar Number Validator
Catch typos with the Aadhaar check digit.
RTO Code Finder
Which state and RTO a vehicle number is from.
Dead Pixel Test
Check a screen for dead or stuck pixels.
Online Ruler
A real-size ruler in cm and inches on your screen.
Decibel Meter
Measure noise levels in dB with your mic.