Merge PDFs
Put several PDFs together into a single document. You put them in the order you want with the arrows and download one file, handy for attachments, invoices and scans that arrived in pieces
Open Merge PDFsThey're free, there's no sign-up, and the work is done by your own computer, so your files never go anywhere

Put several PDFs together into a single document. You put them in the order you want with the arrows and download one file, handy for attachments, invoices and scans that arrived in pieces
Open Merge PDFsTurn the photos of a document into a tidy PDF, one image per page, for when someone asks you for the PDF and all you have are the shots you took with your phone
Open Photos into a PDFMake your images lighter when the portal won't take them or the email is too heavy, you decide how hard to squeeze and you see straight away how much you saved
Open Compress imagesChange the format of your images, from PNG to JPG, from WebP to PNG and the other way round, with the limits stated up front, the iPhone HEIC files only if you open the page on an iPhone or a Mac, camera RAW files never
Open Convert imagesTake a logo in PNG or JPG and get an SVG out of it that you can enlarge without it going blocky, it works on drawings with a few clean colors, on photographs it doesn't and there's no point trying
Open VectorizeNone of these tools uploads your files, the work happens in the browser, we see nothing
Opening a page and sorting out a couple of files now and then is perfectly fine. But if every morning someone downloads the attachments, converts them, renames them and uploads them into the business software, that's a process, and a machine can do it instead