NOPPAWArticle directory
Tool Guides and How-Tos
Practical guides to the jobs behind the tools — image and PDF size limits, document bundles, passport photos, signatures, passwords, and printing at home.
Published guides
These articles are written to support the tools and the trade-offs behind them.
Guide How to Compress an Image to 100KB for Online Forms Why forms cap photos at 100KB, and how to reach the target without turning your portrait into soup. Guide How to Merge PDF Files for a Job Application The document order, file naming and size rules for a single application PDF that a recruiter can actually read. Guide Passport Photo Sizes Explained: 3×4, 4×6, 2×2 Inch, 35×45 mm The common ID photo sizes side by side — centimetres, millimetres, inches, and the exact pixels at 300 DPI. Guide How to Compress a PDF to 200KB Without Making It Unreadable How the 200KB cap works, what DPI does to readability, and the checks to run before you submit the compressed file. Guide Why Some Forms Reject WebP Images (and How to Convert Them) Why older upload forms bounce WebP files, and the clean way to turn them into a JPG or PNG that any system accepts. Guide How to Sign a PDF Without Printing It How visual PDF signatures work, when they are enough, where they are not, and how to place and send them well. Guide How to Password-Protect a PDF Before You Send It What PDF password encryption really protects, the AES basics, and the one channel rule that makes or breaks the whole exercise. Guide Printable Planners and Calendars: How to Get a Clean Print at Home Scale, margins, paper and file format — the four decisions that decide whether a home-printed planner looks clean. Guide How to Reduce Image Size Without Losing Too Much Quality A practical guide to balancing image quality and file size. Guide JPG vs PNG vs WebP: Which Image Format Should You Use? A practical comparison of JPG, PNG, and WebP. Guide Best Image Sizes for Websites A quick planning guide for practical web image dimensions. Guide How to Convert JPG to WebP A step-by-step guide to converting JPG images to WebP. Guide Why WebP Images Are Usually Smaller An explanation of why WebP often reduces image weight.