Two of the most common PDF tasks are the opposite of each other: merging several files into one document, and splitting one document into separate pieces. Both are quick, and both have a couple of details worth knowing.
Merging PDFs
Merging combines multiple PDFs into a single file, in the order you choose. It's the right tool when you need to bundle, say, a cover letter, a résumé, and a portfolio into one document to upload, or to assemble scanned receipts into a single expense report.
One thing to watch: a naive merge can produce a file larger than the sum of its parts. That happens when the source files share the same fonts or images — a basic merge copies those resources once per file instead of recognizing the duplicates. slimdocs runs a consolidation pass after merging that removes duplicated images and fonts, so the combined file stays as small as possible.
- Open slimdocs and choose Merge PDF.
- Add two or more PDFs.
- Merge and download the single combined file.
Splitting PDFs
Splitting extracts pages from a PDF. You might need a single chapter from a long report, or want to separate a scanned batch into individual documents. slimdocs lets you either split every page into its own file or pull out specific ranges.
Page-range syntax
When you want specific pages, the range field accepts a simple, flexible format:
1-3— pages 1 through 3 as one file5— just page 51-3,5,8-10— multiple ranges at once, each becoming its own output- blank — every page is split into a separate file
The result comes back as a ZIP when there's more than one output file, so everything stays neatly together.
A note on privacy
Both tools process your files entirely in memory. Nothing is written to disk, and the original and result are discarded as soon as your download finishes — useful peace of mind when you're combining sensitive documents like contracts or financial records.