Merge PDF

Keep bookmarks

Retain supported bookmarks for included pages and their groups when combining documents.

Add a bookmark for each file

Create a navigation entry for each source document; useful for a bundle with several attachments.

File and page order

Drag files or pages into the desired order; selected pages can move together.

Blank page size, Size unit, Blank page width and Blank page height

Choose a standard page size or custom dimensions in millimeters, inches or points.

Blank page background

Choose the color of a newly inserted blank page.

Insert position and Reference page

Place a blank page before or after an existing page.

Blank page orientation

Choose portrait or landscape for an inserted blank page. This does not rotate existing pages.

Make form entries permanent

Shown when a PDF has interactive form fields. Keep the visible answers while making them uneditable in the new file. Digital signatures will no longer verify; keep the signed original.

Undo and Redo

Step backward or forward through workspace changes before saving. Your original PDF is not overwritten.

Jump to page and Thumbnail size

Use Go to find a page preview, or resize the previews for easier inspection. These controls do not change the saved page size.

All, None, Odd, Even and Select range

Select a group of page previews quickly. Enter page numbers in Select range and click Select, then check the highlighted pages before applying changes.

Rotate, Duplicate and Remove

Turn, copy or discard selected pages before merging. Use Undo to correct a change.

Move to page, First and Last

Place selected pages at a numbered position, at the start or at the end of the combined document.

PDF documents and JPG, PNG or WebP images. Encrypted PDFs need their opening password when required.

Local tests used synthetic 10, 50, 100 and 200 MB PDFs containing large images. Chromium, Firefox and WebKit: completed 10, 50, 100, 200 MB.

Chromium, Firefox and WebKit: completed 50, 300, 1000 text pages. Each test added one companion PDF; this does not measure large batches of separate files.

Merge PDF was tested on a 16 GB Mac with Chromium, Firefox and WebKit. These are observed examples, not guaranteed limits on your device. WebKit tests do not replace a check in Safari on your own device.

Choose your PDFs, drag them into order, then click Merge PDFs and Download. The files are combined on your device, not uploaded.

Yes. Drag the page previews or select a group and use Move to page. You can also open the saved result in Organize PDF to make more changes.

A file with interactive forms may need its filled values made part of the page before merging. Read the warning before continuing. Editing a digitally signed PDF changes the signed document, so keep the original for signature verification.

Enable Keep bookmarks to retain supported entries for included pages and their groups. Links to omitted pages are dropped.

Yes. Enable Add a bookmark for each file to give each source document a navigation entry in the merged PDF.