Merge PDF Online Free

Combine multiple PDFs into one file, reorder pages, free. No upload, no watermark, no login.

Page thumbnailsCross-PDF orderingMetadata controlsNo file upload

Loading PDF workspace…

Merge only the pages you need

Add multiple PDFs, review page thumbnails, select individual pages, reorder pages across source documents, rotate pages, or mark pages for removal. The page summary shows the exact selected count before export.

Large-file progress

Loading and exporting update after each real page operation. There is no simulated timer. Browser memory remains the practical limit, so very large document sets may require smaller batches.

Private browser processing

PDF bytes stay in this browser. Pinned PDF.js and pdf-lib application code is downloaded only when this tool is used; no conversion API receives the document.

Honest limitations

Source annotations are preserved with copied pages. Reliable annotation flattening and bookmark-tree preservation are not enabled because the browser library does not safely expose those operations for every PDF.

How to merge PDFs

Add PDFs with the picker or drag and drop.
Select, rotate, delete and drag pages into the final order.
Set optional title, author, subject, keywords and filename.
Merge and download the generated PDF.

Are PDFs uploaded?

No. Documents remain local during normal processing.

Can encrypted PDFs be merged?

Password-protected or encrypted PDFs may be rejected. The tool shows an error instead of creating a misleading output.

STEP BY STEP

How to use PDF Merger

Combine several PDFs into one, choosing pages, order and rotation.

Click Add PDFs or drop several PDF files. Each page appears as a thumbnail.
Drag pages to reorder; untick Use to skip a page; ↻ rotates; Delete hides a page (Restore brings it back).
Optionally set the file name and document metadata.
The merged PDF is rebuilt automatically; click Download merged-document.pdf.

What you get

One PDF (merged-document.pdf by default) with the selected pages in the shown order.

EVERY CONTROL

Options explained

Option	What it does
Select all / Select none / Invert	Change which pages are used.
Remove selected	Marks the selected pages as deleted.
Restore deleted	Brings back all deleted pages.
Clear all / Start over	Removes all loaded PDFs, pages and the merged result.
Use (per page)	Include or skip that page.
↻ (per page)	Rotate the page 90° clockwise.
Delete / Restore (per page)	Remove or restore a single page.
Click a page	Shows a larger preview with source file details.
Filename	Output name (default merged-document).
Document metadata	Optional Title, Author, Subject and Keywords.
Preserve source page annotations	Keeps comments/links/form annotations (on by default).
Cancel	Stops the current merge.

Limits & tips

Every tool follows the same three steps shown above it — 1 Upload or enter input, 2 Choose options, 3 Preview & download — with a status line that says what to do next. On a computer the options sit on the left and middle and the preview & result panel stays on the right; progress (with % where available) is shown inside that panel. On phones the steps stack in order. Start over clears the tool.
Bookmarks/outlines are not preserved.
Password-protected PDFs must be unlocked first.
Non-PDF files (e.g. JPG) are listed by name with “This file is not a PDF. Choose a PDF document (the file must start with a %PDF header).”; use Image to PDF for images.
“Clear all / Start over” removes every loaded file and page; adding more PDFs otherwise appends their pages after the existing ones.

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