Guides
Step-by-step guides
Clear answers to everyday questions about photos for forms, PDFs, GST invoices, UPI and loans, with the free tool for each job.
How to Reduce Photo Size to 20 KB, 50 KB or 100 KB
Get a photo or signature under the KB limit an online form asks for, while keeping it clear.
Photo and Signature Size for SSC, IBPS and UPSC Forms
The usual photo and signature sizes for major exam forms, and how to resize yours to match.
How to Merge PDF Files on Your Phone (Android & iPhone)
Combine several PDFs, scans or photos into one PDF from your phone browser, no app needed.
How to Make a GST Invoice: Fields, Tax Split and Example
The fields a GST invoice needs, how the tax is split, and how to make one in a few minutes.
How to Create a UPI QR Code for Your Shop or Business
Turn your UPI ID into a printable payment QR code that works with every UPI app.
How EMI Is Calculated: Formula, Examples and Prepayment
Understand the EMI formula, see worked examples, and learn how prepaying changes your loan.