Merge PDF files
Combine several PDFs into one document, in the order you choose.
Select several at once, or drop them anywhere on this page
What to know about Merge PDF
Combine two or more PDFs into a single document. Drag the files into the order you want, then merge. Everything happens inside your browser — the documents are never sent to a server, so contracts, invoices and scanned records stay on your device.
Merging copies pages rather than re-rendering them, which is why nothing loses quality on the way through: text stays selectable, internal links keep working, and images are not re-compressed. A merged file is the sum of its inputs, not a photograph of them.
If one of the files was scanned sideways you can turn it as it goes in, rather than merging first and fixing afterwards. There is no fixed ceiling on how many documents you can combine — the practical limit is the memory of the device doing the work, and you are warned before a job starts if a file looks too large for yours.
Because the whole operation runs in the browser, it also runs with no connection at all. That matters more than it sounds for the documents people actually merge: contracts, invoices, medical records and scanned identity papers.
How to merge PDF files
- 1
Add your PDFs
Drop the files anywhere on the page, or choose them from your device. You can add more at any point before merging.
- 2
Put them in order
Move files up or down until the order is right. The merged document follows this order from top to bottom.
- 3
Merge and download
Press Merge. The combined PDF is built on your device and saved straight to your downloads folder.
What Merge PDF accepts and produces
- Input
- Two or more PDFs, in any order you arrange them.
- Output
- One PDF containing every page of every input, in the order shown.
- Limits
- No fixed page ceiling; very large sets are bounded by the memory of the device doing the work, and the tool warns before it starts if a file looks too big for yours.
- Offline
- Yes, completely. Merging needs no engine beyond the one already in the page.
Why Merge PDF here
- Files are processed in your browser and never uploaded
- No page limit and no watermark on the result
- Bookmarks, form fields, annotations and links are carried across and remapped
- Reorder files with controls that work on desktop and on touch screens
Where your file goes
Nowhere. This tool runs inside your browser, and the page is served with a policy that forbids it from sending your document anywhere. You can confirm that yourself: open your browser’s developer tools, watch the Network tab, and process a file.
Questions
Are my PDF files uploaded to a server?
No. Merging runs entirely inside your browser using a local processing engine. You can confirm this by opening your browser's developer tools and watching the Network tab while the merge runs — no request is made.
How many PDFs can I merge at once?
There is no fixed limit. The practical ceiling is your device's available memory. TryToPDF checks the total size before starting and warns you if the merge is unlikely to complete on your device.
Does merging keep my bookmarks and form fields?
Yes. Bookmarks, form fields, annotations and links are preserved from each source document and remapped to their new page positions.
What happens to a digitally signed PDF?
Merging rewrites the document, which invalidates any existing digital signature. This is inherent to the PDF format. TryToPDF detects signatures before merging and warns you so you can cancel.
Can I merge PDFs without an internet connection?
Yes, once the merge engine has been loaded once. After that it is cached on your device and the tool keeps working offline.
Can I merge PDFs on my phone?
Yes. The tool is built for touch as well as a mouse, and merging runs on the phone itself. Very large documents are limited by the phone's memory rather than by us, and TryToPDF checks the total size before starting and warns you if it looks unlikely to finish.
Will the merged file be as large as all the originals added together?
Usually slightly smaller. Shared resources such as fonts embedded in more than one document are stored once in the result. If the total is larger than you need, run the merged file through Compress PDF afterwards.
Can I merge a password-protected PDF?
Not while it is still protected. TryToPDF detects the password before merging and stops, rather than producing a broken file. Remove the password first using the document's own password, then merge the unlocked copy.
What order will the pages be in?
Exactly the order the cards appear in the grid, with each document’s own pages kept in sequence. Drag a card to change where its pages land.
Worth reading about Merge PDF
- Sending several documents at onceMerging, zipping and splitting solve different problems. Which one to reach for when you have several files to send and a size limit you have to meet.
- An alternative to iLovePDF and SmallpdfiLovePDF, Smallpdf and Adobe all process your document on their servers. Here is what that means in practice, where it is genuinely better, and where it is not.
- PDF work for legal teamsCourt bundles, disclosure and privilege review put demands on PDFs that ordinary tools handle badly. What breaks, and the order of operations that avoids it.
- PDF work for teachersAssembling worksheets, splitting a scanned pile of submissions, and keeping printing costs down. The PDF jobs that come up in a classroom, done quickly.
- PDF work for accountants and bookkeepersGetting figures out of statements, bundling invoices for filing, and meeting the size limits that tax portals impose. The PDF jobs behind a finance workflow.
- PDF work for HR teamsHiring and personnel paperwork is dense with personal data. How to bundle, redact and share it without creating a data-protection problem for yourself.
- PDF work on a phone, without an appMerging, compressing and scanning on a phone usually means an app that wants a subscription. What a browser can do instead, and where the real limits are.