Merge PDF
Combine several PDFs into one file, in the order you choose, without uploading anything.
Combine Several PDFs Into One File
Merging PDFs is the most common thing anyone needs to do to a PDF, and it is usually the moment a private document gets handed to a stranger: bank statements, medical letters, tenancy agreements and signed contracts all get uploaded to a free merger and then, supposedly, deleted.
This merger reads the structure of each file directly in your browser. It walks the page tree, copies each page along with the fonts, images and colour profiles it depends on, and writes a fresh document with a new cross-reference table. Page content is copied in its already-compressed form, so nothing is re-encoded and nothing degrades.
Key features
- Order you control — every file shows its page count, and the arrows move it up or down before you merge.
- Nothing is re-rendered — page streams are transferred with their original compression intact, so text stays selectable and images stay sharp.
- Page geometry preserved — a mix of A4, Letter and rotated landscape pages arrives in the merged file exactly as it left.
- Damaged files still open — when a PDF has a broken cross-reference table, the reader rebuilds it by scanning for objects instead of refusing the file.
- Honest about encryption — a password-protected PDF is reported clearly rather than producing a silently broken merge.
This tool runs entirely inside your browser using native Web APIs. Your files and text are never uploaded to a server, never logged and never shared with third parties.
How to use: Merge PDF
- Add your PDFs
Drop two or more files onto the box, or click to browse. Each one is parsed on the spot and listed with its page count and size; anything unreadable is named rather than silently skipped. - Arrange the order
The merged document follows the order in the list. Move files with the arrows, remove one with the cross, or clear the lot and start again. - Check the total
The badge on the toolbar shows the total page count across every file, which is a quick sanity check before you commit. - Merge and download
Press Merge and download. The combined PDF is built in memory and saved straight to your device, with the final size reported when it is done.
Technical specifications
| Processing location | Entirely in your browser — no server round trip |
|---|---|
| Data uploaded | None. Files and text never leave your device |
| Price | Free — no account, no trial, no usage cap |
| Category | |
| Works offline | Yes, once the page has loaded |
| Browser support | Chrome 90+, Edge 90+, Firefox 90+, Safari 15+ |
| Interface languages | English, 中文, हिन्दी, Español, العربية |
Frequently asked questions
Is there a file size or page limit?
No imposed limit, because there is no upload and no server quota to enforce. Very large documents are bounded only by the memory available to the browser tab. Merging a few hundred pages is routine.
Do links and bookmarks survive the merge?
Annotations, including links, are copied with each page. A link that pointed at a page outside the merge loses its destination rather than dragging the whole original document into the output — that trade keeps merged files small and free of orphaned content.
Can it merge a password-protected PDF?
No, and it says so instead of producing a corrupt file. Encrypted PDFs need the password to decrypt their content streams. Remove the protection in the application that created the file, then merge the unlocked copy.
Will the merged file be larger than the originals added together?
It is normally a little smaller. Resources shared between pages of the same source file are copied once and referenced many times, and the unused parts of each original — old revisions, orphaned objects, stale metadata — are not carried over at all.
Does the page order inside each file change?
No. Pages within a file keep their original sequence; the list only controls the order the files are placed in. To reorder pages inside one document, use the Extract PDF Pages tool, which accepts ranges in any order you like.