Guides, page 5
How to cut out a picture in the app you already use, what a transparent PNG really is, and which background each place wants. Every method is tested, and every tool is named with whether it uploads your photo.
How to upscale an image without losing quality
Enlarge a photo two to eight times with an AI model or a classical filter, which to choose for photos and logos, and the settings that matter.
23 Sept 2026
Image resolution explained: pixels, dpi and how big you can go
What resolution actually is, why dpi means nothing on a screen, how to work out the pixels a print needs, and when enlarging a picture is worth doing.
23 Sept 2026
Passport photo requirements by country, in one table
Passport and visa photo sizes for twelve documents in one table: millimetres, head height, background colour and the official source, checked September 2026.
23 Sept 2026
Removing a green screen in CapCut, OBS, Zoom, Photoshop and Canva
Where the chroma key lives in the apps people actually use, what each one calls its settings, and what to do when the app has no keyer at all.
23 Sept 2026
SVG or PNG: which one to use, and when to convert
A practical comparison of SVG and PNG for logos, icons, photos and email, with the file size numbers and the places SVG is not accepted.
23 Sept 2026
UK passport photo requirements: size, head height and background
UK passport photo rules checked September 2026: 35 x 45 mm, head 29 to 34 mm, a cream or light grey background rather than white, and how to take one at home.
23 Sept 2026
Upscaling an image for print: the numbers that matter
How many pixels a print really needs, why 300 dpi is not always the answer, how far you can enlarge, and what to send a printer so nothing goes wrong.
23 Sept 2026
What AI upscaling can and cannot do
How a super-resolution model actually works, why it draws plausible detail rather than recovering real detail, and where that difference matters.
23 Sept 2026
What is an SVG file, and when should you use one
SVG explained: shapes instead of pixels, why it stays sharp at any size, what it cannot do, and how to open, edit and convert one safely.
23 Sept 2026
Why does my image look blurry, and how to tell which kind it is
Six different causes of a blurry picture, how to tell them apart in under a minute, and which ones can be fixed and which ones cannot.
23 Sept 2026
How to combine PDF files into one, on any device
Combine PDFs on a Mac, a PC, a phone or in a browser, with the built-in ways first. Getting the order right, taking only some pages, and what breaks.
19 Sept 2026
How to compress a PDF, and why some will not shrink
What actually makes a PDF big, how to make it smaller on a Mac, a PC or in a browser, and how to tell in advance whether there is anything to take off.
19 Sept 2026Reading about it is slower than trying it
Drop a photo and get a transparent PNG at full resolution. Free, no account, nothing uploaded.