Merge PDF files

How to merge PDF files

1. Drop your PDFs onto the box above, or click it to browse. You can add them all at once, or a few at a time.
2. Check the list that appears underneath. The files are joined from top to bottom, in the order they were added, and the × beside a name takes that file back out.
3. Press Merge PDFs. The button stays greyed out until at least two files are in the list.
4. The combined document downloads on its own as editzap-merged.pdf. If your browser blocked the automatic download, the "Download again" button repeats it.

What people use it for

Merging is usually the last step before something gets sent out: several separate documents that really ought to arrive as one attachment. Typical cases we hear about:

• Rebuilding a contract after the counter-signed pages come back as their own file.
• Bundling a month of supplier invoices into one PDF for the accountant.
• Joining a cover letter, a CV and scanned certificates into a single application document.
• Stitching together scans made a few sheets at a time, because the feeder only takes a small stack.
• Assembling a report from sections written by different people.

Good to know

Pages are copied across exactly as they are, so text stays selectable, page sizes are preserved and portrait and landscape sheets can happily sit in the same file. What travels less reliably is anything attached to a document as a whole — bookmarks, form fields and internal cross-references may not survive the copy. If one of the source files is damaged, the merge stops and the reason appears in the status line under the button.

There is no drag-to-reorder step: order comes from the order you added the files, so if the sequence is wrong, remove a file with × and add it again at the right moment. Merging also does nothing to file size — it only joins, never compresses — so the result is roughly the sum of its parts. If the total is too heavy for an email, run it through Compress PDF afterwards.

On privacy: no part of this page talks to a server. Your documents are read by the JavaScript already loaded in the tab, assembled in your device's memory, and handed straight back to you as a download. Nothing is uploaded, which is unusual — most sites that merge PDFs send your files to their own machines first.

Questions people ask

Is there a limit on how many PDFs I can merge?

No limit is built into the tool. The practical ceiling is your device's memory, because every file is opened in the browser at the same time. A few dozen ordinary documents are comfortable; hundreds of large scans on an older phone may run out of room, in which case merge in two or three batches and then merge the results.

Can I merge a password-protected PDF?

Files that carry editing restrictions but open without a prompt are normally read without trouble. A PDF that demands a password before it will even display cannot be opened here — clear that password first, using Unlock PDF or a viewer you already have it in.

Will the merged file be smaller than the originals?

No. Every page is kept at its original quality, so expect a size close to the sum of the inputs, minus a little shared overhead.

What if I only need part of one document in the merged file?

Trim it before you merge. Split PDF pulls out just the pages you want, and Delete Pages drops the ones you don't. Either gives you a file you can add straight back in here.