Turn a PNG or JPG into a multi size .ico favicon, or into the individual PNG icons a web app manifest asks for. Built in your browser.
A web app manifest wants loose PNGs rather than an .ico.
The conversion runs entirely in your browser. Your files stay on your device from start to finish, there is no server copy, and nothing is stored once you leave the page. That is true for every tool on FileFlip.
A favicon is the small icon a browser shows in the tab and in a bookmark list. The classic format is .ico, which is unusual in that a single file holds the same icon at several sizes, letting the browser pick the one that fits. This tool builds that file from a PNG or JPG, and can also hand you the loose PNG icons that a web app manifest asks for.
Start from something square and simple. A logo with fine detail turns to mush at 16 pixels, so a bold mark reads far better than a full lockup.
16, 32 and 48 covers the classic favicon. The wider set adds 64, 128 and 256 for pinned tabs and desktop shortcuts.
A web app manifest references PNG files by size rather than an .ico, so tick the box if you are filling one in.
Put favicon.ico at the root of your site. Browsers ask for that path by habit even when no link tag points at it.
A modern .ico may hold PNG data directly, which is what this writes. Every browser in use and Windows itself have accepted that for well over a decade.
Icons are square. A wide image is squeezed to fit rather than trimmed, because cropping would silently cut part of a logo off. Crop it yourself first if you would rather choose what goes.
At 16 pixels a letter is about 10 pixels tall. Thin outlines and gradients disappear at that size, so favour solid shapes and strong contrast.