Add your files
Drop one PNG or two hundred. Batch conversion is not a paid feature here.
An upload form, a forum, a signature field or a piece of legacy software accepts GIF and nothing newer.
The image is quantised down to a palette of at most 256 colours and stored with LZW compression. Everything above that palette is approximated, usually by dithering neighbouring pixels to fake the missing shades.
This is the one image conversion that is lossy in a way you can see immediately. A photo loses smooth gradients to visible banding, and transparency collapses from 256 levels of alpha to a single fully transparent colour, which leaves ragged edges.
GIF cannot hold more than 256 colours. A sky that used thousands of shades has to pick 256 of them, and the joins are the stripes you are seeing.
Yes, that is the main legitimate reason to still produce GIF. Frame ordering and delay are set at conversion time.
Drop one PNG or two hundred. Batch conversion is not a paid feature here.
Graphics Interchange Format is lossy, so the quality control decides the trade between size and fidelity.
Converted and deleted the moment it finishes. Never written to permanent storage.