Merge PDF
PDF… → PDFCombine several PDFs into one file, in the order you set.
1 · Files to join
Is this PDF password-protected?
Used once, in this tab, to decrypt the file. It is never sent anywhere.
2 · Result
About Merge PDF
Joining PDFs is the most common last step before a submission: a signed form, a set of certificates, a covering letter that all have to arrive as one document. Add the files, drag them into the order you want, and the pages are copied across untouched — same resolution, same fonts, same text layer.
How it works
- 1Add two or more PDFs. They stack up in the order you add them.
- 2Use the arrows to reorder until the sequence is right.
- 3Press Merge PDF and download the combined file.
Questions
- Does merging reduce the quality of the pages?
- No. Pages are copied object for object into a new document, so images keep their original resolution and the text stays selectable and searchable. The merged file is roughly the sum of the originals in size.
- How many PDFs can I merge at once?
- There is no fixed limit. The practical ceiling is your device’s memory, since every file has to be held open at the same time. A few dozen ordinary documents is unremarkable; hundreds of large scans on a phone may not fit.
- Can I merge password-protected PDFs?
- Yes, if you know the password. Open the “Is this PDF password-protected?” panel and enter it — the files are decrypted in this tab so their pages can be copied. The merged output is not encrypted; use Protect PDF afterwards if you need it to be.
- Are bookmarks and form fields kept?
- Page content, annotations and links are carried over. Document-level structure — the outline or bookmark tree, and interactive form definitions — is not reassembled, because merging several documents’ structures reliably is a different job from copying pages.
- Are the PDFs I merge uploaded anywhere?
- No. The conversion runs in your browser using JavaScript and WebAssembly — the file is read into this tab’s memory and written back out there. The site is served as static files from Cloudflare’s edge and has no upload endpoint, no database and no server-side processing. The page ships a Content Security Policy that forbids it from contacting any host other than its own origin, so this is enforced by your browser rather than promised by us.
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This page does the work itself, in this tab. Nothing about your file — not its name, not its contents — is sent to a server. Close the tab and no copy remains.