Merge PDF
Select multiple PDF files to combine into one.
Drop files here
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Max 10 files, 20 MB total
About merging PDF files
Merging is the least destructive thing you can do to a PDF. Nothing is re-encoded and nothing is rasterised — the pages from each source file are copied into a single new document exactly as they were, so text stays selectable, vector charts stay sharp, and embedded fonts carry over untouched. A merged file is normally close to the sum of its parts in size.
The one thing merging cannot repair is inconsistency between the files you started with. If one report was laid out at A4 and another at US Letter, the merged PDF keeps both page sizes rather than forcing them to match. That is deliberate — resizing would crop or distort content — but it does mean a mixed-format merge can look uneven when printed. If a consistent trim size matters, normalise the sources before combining them.
How to combine PDF files
- 1Select every PDF you want to combine. Order matters: files are merged top to bottom in the order they appear in the list.
- 2Check the sequence before starting — reordering afterwards means merging again from scratch.
- 3Start the merge and wait for processing to finish.
- 4Download the combined PDF.
Limits and technical details
- Accepts .pdf files only, up to 10 at a time
- 50 MB per file, 200 MB total per job
- Page content is copied, not re-encoded — no quality loss
- Original page dimensions are preserved per source file
Frequently asked questions
- Will merging reduce the quality of my PDFs?
- No. Merging copies page objects across without re-compressing images or rasterising text, so the merged document is visually identical to the originals. If you need a smaller file afterwards, run the result through Compress PDF as a separate step.
- What happens to bookmarks, links and form fields?
- Internal page links and bookmarks generally survive the merge, but they can point to shifted page numbers. Interactive form fields are the fragile case: when two source files use the same field names, the merged document can end up with fields that share a value. Flatten forms before merging if that would be a problem.
- Can I merge files with different page sizes?
- Yes, and each page keeps its original dimensions. The merged PDF will simply contain pages of more than one size, which most viewers handle without complaint but which can produce inconsistent margins on paper.
- Is there a way to merge only some pages from a file?
- Not in a single pass. Split the source PDF first, keep the pages you want, then merge those into your final document.