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IBPS Photo, Signature, Thumb Impression and Declaration Size: Official Rules

Every IBPS upload requirement from the official scanning guidelines: photo, signature, left thumb impression and handwritten declaration, with pixel sizes, KB ranges, the exact declaration text, the rules that make applications invalid, and how to prepare each file.

How to Make a Google Review QR Code for Your Business

How to copy your official review link from Google Business Profile, turn it into a QR code and printable card, where to place it so customers actually scan it, and which review practices Google prohibits, from incentives to selective asking.

SSC CGL and CHSL 2026 Photo and Signature Size: Live Photo Rules and 10–20 KB Signature

What the SSC CGL 2026 and CHSL 2026 notices actually say: your photo is captured live, not uploaded, and the signature must be a 10–20 KB JPEG of about 6 cm × 2 cm. Live photo tips, the Aadhaar authentication exception, and common rejections.

How to Reduce Photo Size to 20 KB–50 KB for Online Forms Without Losing Quality

Why phone photos are far too big for exam forms, what the KB limits really mean (including the minimum), official photo and signature limits for IBPS, SSC, UPSC, NEET and JEE, and a step-by-step way to hit 20–50 KB with a clear face.

How to Make a UPI QR Code for Your Shop (Free, Works With Every UPI App)

What a UPI QR code contains, merchant QR vs your own UPI ID, how to make, test and print one for your counter, how to stop the sticker scam, and what NPCI's new charge on merchant payments from 15 October 2026 means for small shops.

What Is EXIF Data? How Photo Metadata Works and How to Remove It

What EXIF data actually is, what it can and cannot reveal (including a real, documented GPS-metadata incident), why it's genuinely useful for photographers, and how to view or remove it before sharing a photo.

What Is Readability Score? Flesch Reading Ease Explained

What a readability score actually measures, how the Flesch Reading Ease formula works, why a lower score is sometimes correct, and practical ways to improve readability — with a before/after example scored using the real formula, not invented.

What Is a Cron Expression? A Beginner's Guide

A beginner's guide to cron expressions: the five-field syntax, special characters, verified real-world examples, PHP and Linux usage, timezone gotchas, common mistakes, and a practical debugging checklist.

MD5 vs SHA-256: What's the Difference?

MD5 vs SHA-256 explained: output size, collision resistance, why MD5 is broken for security use, whether SHA-256 is safe, file checksums, and why neither belongs in password storage — with every example hash independently verified, not invented.

UUID vs ULID: What's the Difference?

UUID vs ULID compared: UUID v4 vs UUID v7 vs ULID format, sortability, database indexing, storage, and API/URL use — with correctly computed examples and no invented benchmarks, so you can pick the right ID format for your project.

What Is URL Encoding? URL Encoding Explained With Examples

How URL encoding (percent-encoding) works: why URLs need it, which characters are reserved, %20 vs +, encoding a value vs a whole URL, double-encoding, and correct examples in JavaScript and PHP.

What Is a JWT? JSON Web Token Explained Simply

A practical guide to JSON Web Tokens: the header, payload, and signature; how JWT authentication and bearer tokens work; why a signed JWT isn't encrypted; JWT vs sessions; expiration; and common security mistakes.

Kravoy Blog