Image, PDF & File Guides
Practical guides to image compression, dimensions and DPI, PDF conversion, page organization, and file upload errors.
File guides2026/09/16
File too large or unsupported format? Diagnose an upload failure
A step-by-step checklist for file size, actual format, image dimensions, PDF restrictions, filenames and browser-side upload errors.
PDF guides2026/09/09
Why a scanned PDF is large, and how to compress it safely
Learn why scan-heavy PDFs resist compression, which details can be lost, and how to verify pages, signatures and readability after reducing file size.
PDF guides2026/09/02
Merge PDFs or select pages: a checklist for the final document
Combine PDF files, extract required pages and correct orientation while checking order, page ranges, signatures and upload limits.
Image guides2026/08/26
Image pixels, file size and DPI: which setting should you change?
Understand width and height, KB limits and print density, with concrete examples for resizing an image without confusing DPI with detail.
Image guides2026/08/19
How to compress a JPG or PNG to 200 KB without losing readability
Reduce image file size in a sensible order: pick a format, keep required dimensions, adjust quality, and verify the actual byte count.
PDF guides2026/08/12
How to combine images into a PDF that stays readable
Plan image order, page orientation and file size before converting JPG, PNG or phone photos into one PDF for an upload form.