How to reduce photo size in KB without ruining it
Why phone photos are 3–5 MB, the two ways to make them smaller, and the exact settings that get a photo to 20, 50, 100 or 200 KB while keeping it sharp.
Guides
Short, practical answers to the questions people ask most when a file is too big, the wrong format or rejected by a form.
Photo or signature rejected on an online form? 7 fixes
Fix "file size exceeds limit", "invalid dimensions", "file too small" and other upload errors on exam, job and government application forms.
How to convert HEIC to JPG on iPhone, Windows and Mac
What HEIC is, how to make your iPhone save JPG instead, and the quickest ways to convert existing HEIC photos on Windows, Mac and the web.
How to make a PDF smaller for online upload forms
Why scanned PDFs are huge and how to get them under 100 KB, 200 KB or 1 MB: resolution, black and white, page count and the right order of steps.
KB vs MB: file sizes explained
How many KB are in an MB (1000 or 1024?), how to check a file's size on any device, and a KB to MB conversion table for upload limits.