Guides: image and PDF formats explained
Practical explanations of image and PDF formats, sizes and compatibility.
How to compress an image without losing visible quality
Most compression damage comes from doing the steps in the wrong order. Here is the sequence that keeps a photo sharp at a fraction of the size.
→HEIC vs JPG: which should you use?
HEIC keeps more detail than JPG at the same size, but almost nothing outside Apple opens it. Here is when each format is the right choice.
→How to get an image under a size limit
Upload forms ask for 200 KB, 1 MB or something else. Here is the order of operations that gets there without ruining the picture.
→How to merge PDF files into one document
Combine several PDFs in the order you need, without uploading them. What merging does to page quality, bookmarks, forms and links.
→PNG vs JPG: which format should you use?
PNG is lossless, JPG is small. One is right for logos and screenshots, the other for photographs. Here is how to decide in seconds.
→How to split a PDF into separate pages or files
Extract a page range, split every page into its own file, or break a scan into chapters - without uploading the document.
→WebP vs JPG vs AVIF: which should your website use?
AVIF is the smallest, WebP the most widely supported, JPG the safest. A practical comparison with numbers, and how to choose per image.
→What is EXIF data, and why should you remove it?
Every phone photo carries hidden metadata: camera, timestamp and often the exact GPS coordinates of where you stood. What it holds and how to strip it.
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