CalcKitHow to Use the PDF Tools
PDFs are everywhere — job applications, invoices, scanned documents — and sooner or later you need to combine a few of them or pull out just a couple of pages. These tools do both jobs without installing anything and without sending your documents to a server, which matters when the files contain personal information.
To merge: click the file picker and select all the PDFs you want to combine (hold Ctrl or Cmd to pick several at once). They are joined in the order shown in the list. Press Merge PDFs and a single file called merged.pdf downloads instantly. Page content is copied exactly, so quality does not change.
To split: upload one PDF, then type the first and last page numbers you want — for example 2 to 5 to pull out the middle of a report. Press Split PDF and you get a new file with only those pages. This is handy for sharing one chapter of a document, or removing pages you do not need before emailing a file.
One honest note: this page does not compress PDFs. Real PDF compression means re-encoding the images inside the file, which cannot be done reliably in a browser — any site that claims one-click browser PDF compression is either uploading your file to a server or faking the result. If you need a smaller file, splitting out unneeded pages is the safe way to shrink it here.