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In-depth guides on Indian documents, validation, and privacy.
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January 2024 · 8 min read · Aadhaar
How to Validate Your Aadhaar Number Online — Complete Guide
Everything you need to know about Aadhaar format validation, the Verhoeff algorithm, common mistakes, and how to check if a number is valid without contacting UIDAI.
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January 2024 · 6 min read · PAN
PAN Card Format Explained — What Each Character Means
A deep dive into the 10-character PAN format: jurisdiction codes, entity types, surname initials, and the logic behind each position. With real examples.
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January 2024 · 7 min read · GST
GST Number Structure Decoded — State Code, PAN, Entity Number
Breaking down the 15-character GSTIN: what each segment means, how to find the state from any GST number, and why the 'Z' is always there.
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January 2024 · 5 min read · Privacy
Why You Should Always Mask Your Aadhaar Before Sharing
UIDAI recommends sharing only masked Aadhaar. Here's why it matters, what risks you face by sharing full Aadhaar, and how to create a masked copy for free.
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