Detailed, practical writing on the problems people actually run into: photo and signature specifications for online forms, getting a document under an upload limit, scanning with a phone, and choosing between image formats. Every guide is written from scratch and updated as requirements change.
Images
How to Optimise Images for a Faster Website — Images are usually the heaviest thing on a web page. How to pick the right format and dimensions, how many sizes you actually need, and which loading attributes matter. (8 min read)
DPI, Pixels and Print Size Explained — Why DPI does not exist inside a digital image, how to convert between pixels and physical size, what resolution you need for print, and why upscaling cannot add detail. (7 min read)
JPG vs PNG vs WEBP vs AVIF: Which Format Should You Use? — How the major image formats actually differ, which one to pick for photos, logos, screenshots and uploads, and the compatibility traps that catch people out. (9 min read)
Why Your iPhone Photos Are HEIC and How to Fix It — What HEIC is, why Apple uses it, why Windows and government portals reject it, how to convert it to JPG, and how to stop your iPhone producing it in the first place. (7 min read)
Why In-Browser File Tools Are Safer Than Upload-Based Converters — What actually happens when you upload a file to an online converter, how client-side processing differs technically, and how to verify for yourself that a tool is not transmitting your data. (8 min read)
Forms & applications
How to Make a Clean Digital Signature for Online Forms — Capture a signature that passes upload validation and looks professional: pen and paper choice, lighting, contrast clean-up, exact sizing, and the transparency trick for documents. (7 min read)
Passport Photo Size Requirements: India, US, UK and Schengen — Passport photo dimensions, head-size rules, background and expression requirements for major countries — and how to crop a compliant photo yourself from an ordinary picture. (7 min read)
Preparing Documents for eMitra and SSO Rajasthan Uploads — What eMitra and SSO Rajasthan portals expect from scanned documents, why uploads fail, and how to prepare compliant JPEG and PDF files before you reach the counter. (8 min read)
Photo and Signature Size for Online Exam Forms: A Complete Guide — Exact photo and signature dimensions, file sizes and formats required by SSC, IBPS, UPSC, RRB, NTA and state exams — plus how to hit those numbers without your image turning blurry. (9 min read)
Why we write these
Most people arrive at a file converter because something rejected their upload, and the error message rarely explains why. The tools fix the symptom; these guides explain the cause, so the next form goes more smoothly than the last one.