The only way to download many icons at once is to create a collection, adding icons one-by-one. Then, download the entire collection as a ZIP file. There is no option to download an entire platform of icons at once.
There's no option to download many illustrations at once. If you want to have them in PNG or SVG format, please download them one-by-one.
If you want to have all the icons offline, you are welcome to use our desktop app.