How many PDFs can I merge at once?

Up to 50 files in one batch, each no larger than 100 MB. Because the work happens in your browser tab, the real ceiling is your machine's memory — if you hit it, merge in two rounds and join the results.

Does merging keep the original page size and quality?

Yes. Pages are copied as they are, so a landscape A3 page sits next to a portrait A4 page without either being resampled or re-rendered.

Can I merge a password-protected PDF?

Not while it is locked. Run Unlock PDF first — it takes the document password and gives you an unprotected copy — then merge that.

Will the merged PDF be bigger than the originals combined?

Usually slightly smaller, because shared resources and duplicate object tables are written once. If you need it much smaller, pass the result through Compress PDF.

Merge PDF

Combine multiple PDFs into one document, in the order you choose.

Drag & drop the PDFs to merge

or click to browse — .pdf · up to 50 files

Add at least 2 PDFs to merge them.

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About Merge PDF

Merge PDFs into one document without losing a page, a link or the text layer. Drop in up to 50 files, set the order you want, and the combined PDF is assembled in your browser tab — nothing is uploaded, so there is no queue and no size cap beyond a 100 MB-per-file safety limit.

Putting invoices, scans and statements into one file before you email them.

How to use Merge PDF in 3 steps

Drop every PDF you want joined onto the drop area, or use Browse files to pick them.
Drag the files into reading order — the list on the left is the page order in the output.
Press Merge and download the single PDF that now holds all of them.

What you get with Merge PDF

Page order is yours to set, not the order the file picker returned
Text stays selectable and searchable in the merged file
Bookmarks, form fields and links in the source files are preserved
Runs in your browser — the file is never uploaded
Free to use, with no signup and no account
No watermark or logo added to your output
Works on desktop and mobile, no install

Merge PDF: questions

How many PDFs can I merge at once?: Up to 50 files in one batch, each no larger than 100 MB. Because the work happens in your browser tab, the real ceiling is your machine's memory — if you hit it, merge in two rounds and join the results.
Does merging keep the original page size and quality?: Yes. Pages are copied as they are, so a landscape A3 page sits next to a portrait A4 page without either being resampled or re-rendered.
Can I merge a password-protected PDF?: Not while it is locked. Run Unlock PDF first — it takes the document password and gives you an unprotected copy — then merge that.
Will the merged PDF be bigger than the originals combined?: Usually slightly smaller, because shared resources and duplicate object tables are written once. If you need it much smaller, pass the result through Compress PDF.