Blog
Guides & explainers
Practical articles on finance calculators, converters, security and online tools — with free MerQPrime utilities linked in every guide.
How to Create a UPI QR Code Online — Free Step-by-Step Guide
Learn how to create your UPI QR code online for Google Pay, PhonePe and Paytm. Free UPI QR generator with download, print and business setup tips.
Static vs Dynamic UPI QR Codes — Which Should You Use?
Compare static and dynamic UPI QR codes for Indian businesses. Learn when to use a dynamic UPI QR code generator vs static shop standees.
UPI ID to QR Code Converter — Complete Guide for India
Convert UPI ID to QR code for instant scan-and-pay. Free UPI ID to QR converter for PhonePe, GPay, Paytm with step-by-step setup and security tips.
Best Free Word Counter Tool — Count Words, Characters and SEO Lengths
Compare free word counters for writers and SEO, learn what to measure for meta descriptions and articles, and count text privately in your browser.
FD Calculator Guide — Fixed Deposit Maturity in India
Learn how fixed deposit interest is calculated in India with quarterly compounding and use our free FD calculator for maturity amount and yield.
GST Calculation Guide for India — Add, Remove & Split Tax
Learn how to add or remove GST in India across 5%, 12%, 18% and 28% slabs, with CGST, SGST and IGST explained.
How to Create a GST Invoice in India
Step-by-step guide to GST tax invoices with CGST, SGST and IGST — plus a free GST invoice generator for Indian businesses.
How JWT Tokens Work — Structure, Signing and Debugging
Understand JSON Web Token header, payload and signature, common claims, validation pitfalls and decode JWTs safely with MerQPrime's free JWT decoder.
How to Calculate Age from Date of Birth
Calculate exact age in years, months and days for forms, eligibility checks and milestones — plus a free age calculator.
How to Calculate EMI — Home, Car & Personal Loans
Learn how EMI is calculated in India, what affects your monthly payment, and use our free EMI calculator to plan home, car and personal loans.
Image Compression Guide — Reduce File Size Without Losing Quality
Learn how image compression works, when to use JPEG vs PNG, and compress images free in your browser with MerQPrime.
Meta Tags for SEO — Titles, Descriptions and Robots Directives
Learn which meta tags matter for SEO, how to write titles and descriptions that earn clicks and generate meta tags with MerQPrime's free tool.
Open Graph Tags Explained — Social Previews That Convert
Master Open Graph meta tags for Facebook, LinkedIn and messaging apps — image sizes, required properties and generate OG markup with MerQPrime.
Password Security Guide — Create Strong Passwords
Best practices for strong passwords, why length beats complexity alone, and how to generate secure passwords with MerQPrime.
Percentage Calculation Guide — Formulas & Examples
Master percentage math: find X% of Y, calculate increase, decrease and difference between values with formulas and examples.
PPF Calculator Guide — Public Provident Fund Returns
Learn how PPF interest compounds annually, the 15-year lock-in and use our free PPF calculator to project tax-free maturity in India.
QR Code Guide — Create & Use QR Codes Online
What QR codes are, how they work, best practices for links and payments, and how to generate QR codes free with MerQPrime.
RD Calculator Guide — Recurring Deposit Maturity in India
Understand how recurring deposit maturity is calculated for monthly instalments and estimate returns with our free RD calculator for India.
Regex Guide for Beginners — Patterns, Flags and Testing
Learn regular expression basics — literals, character classes, quantifiers and anchors — and test patterns live with MerQPrime's free regex tester.
SQL Formatting Best Practices — Readable Queries for Teams
Learn SQL formatting conventions, keyword casing, indentation rules and format queries instantly with MerQPrime's free online SQL formatter.
Unit Conversion Explained — Length, Weight, Temperature & More
Learn how unit conversion works across length, weight, temperature, area, volume and speed — with a free online unit converter.
UPI QR Code Guide — Accept Payments in India
How UPI QR codes work, what paam (UPI payment string) fields mean, and how to generate a UPI QR code for your business.
URL Encoding Explained — Percent-Encoding, Query Strings and Pitfalls
Learn why URL encoding exists, how percent-encoding works for query strings and paths, and encode or decode URLs with MerQPrime's free tools.
What Is Schema Markup? JSON-LD, Rich Results and SEO
Learn what schema markup is, how JSON-LD helps search engines understand your pages and generate valid structured data with MerQPrime's free tool.
What Is SHA256 Hashing? Uses, Security and How to Generate Hashes
Learn how SHA256 works, where it is used in security and development, and generate SHA256 hashes instantly with MerQPrime's free online tool.
What Is SIP Investment? A Beginner's Guide for India
Understand Systematic Investment Plans (SIP), how returns compound over time, and estimate future value with our free SIP calculator.
XML vs JSON — When to Use Each Format in Modern Apps
Compare XML and JSON for APIs, config and data exchange — syntax, tooling, performance and format documents with MerQPrime's free online tools.