MERGE PDF

Combine several PDFs into one file, in the order you choose. Images and plain text files can go in too: each image becomes a page, and each text file becomes a few pages of plain text.

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About Merge PDF

How Can You Verify That Your Files Never Leave This Browser?

You do not have to take our word for it. Browser developer tools list every request a page makes, so you can watch 2pdf work and confirm that your document is never sent anywhere. The check takes about a minute.

Open your browser developer tools with F12, or Cmd+Option+I on a Mac, and select the Network tab.
Reload the page and let it finish. You will see the page's own files, its web fonts, the PDF engine, and one anonymous page-view request. No file has been chosen yet, so none of them can contain your document.
Click the clear icon in the Network tab so that the log is empty.
Choose two or more PDFs in the Merge PDF tool above and press its button, then save the result.
Look at the Network tab again. It is still empty, or it shows only files fetched from 2pdf.app itself, such as a standard font or an image decoder the PDF engine needed to draw a page. Click any of them: each one is a request for a file, and none carries your document. For extra proof, turn on offline mode after the page loads and the tools keep working.

Your file is read into this tab's memory with the browser's own file reader, processed by code that is already on the page, and handed back to you as a download. It is never uploaded, never stored in the browser, and gone when you close the tab. The only other request the site can make is the feedback form, and only when you submit it.

The production site also sends a Content-Security-Policy header that tells your browser to refuse connections to anywhere except this site and the anonymous analytics endpoint, so even a bug could not send a file elsewhere.

How Does Merging Work?

Each PDF's pages are copied, untouched, into a new document in the order shown. Nothing is re-rendered or recompressed, so text stays selectable, links and vector drawings stay sharp, and the result is about the size of the inputs added together.

PDFs keep every page, in their own order, with their original page sizes.
Images (JPG, PNG, WebP, GIF, BMP) each become one Letter-size page, turned to landscape for wide images, with a half-inch margin.
Text files (TXT, MD) become Letter pages in a plain font, with the file name at the top and long lines wrapped instead of cut off.

Can You Merge Images and Text Files With PDFs?

Yes. That is the merge that used to live at 2join, now with images added. A common use: a PDF form, a photo of a receipt, and a short note, all in one attachment. Images are placed whole, scaled to fit the page without cropping. If you want image pages in a different size, make them into a PDF first with Images to PDF, which lets you pick Letter, A4, Legal, or fit-to-image, and then merge that.

What Happens to Bookmarks, Links, and Forms?

Page content, including links drawn on the page, comes across with each page. Document-level extras do not: the merged file has no bookmarks (outline), and fillable form fields from the inputs may stop being fillable, because two forms can use the same field names. If you need to fill a form, fill it and flatten it first, then merge.

Why Might a File Be Refused?

It is password-protected or has editing restrictions. Encrypted PDFs cannot be merged here; remove the protection in the app that added it.
It is damaged or is not really a PDF, for example a web page saved with a .pdf name.
It is an image format your browser cannot decode, such as HEIC from some iPhones. Export it as JPG first.

When one file is refused, the message names it, so you can remove that row and merge the rest.

What Else Can You Do With a PDF Here?

Split PDF: Extract a page range, or cut a PDF into single pages, fixed-size parts, or your own ranges.
Organize PDF pages: See every page as a thumbnail, then reorder, rotate, delete, or insert blank pages.
Rotate PDF: Rotate every page or just the pages you list by 90, 180, or 270 degrees, losslessly.
PDF metadata editor: View and edit title, author, subject, keywords, and dates, or strip all document metadata.
Fill PDF form: Fill text boxes, checkboxes, radio buttons, and dropdowns in a PDF form, then flatten if you like.
Images to PDF: Turn JPG, PNG, WebP, GIF, or BMP images into one PDF, with Letter, A4, or fit-to-image pages.
PDF to images: Render PDF pages to PNG or JPG images at the resolution you pick, one image per page.
Extract text from PDF: Pull the text out of a PDF page by page, then copy it or save it as a plain .txt file.

All nine tools are on the 2pdf home page. Part of the 2suite.io privacy-first ecosystem.

Frequently Asked Questions

How many PDFs can I merge at once?

There is no set limit. The practical limit is your device's memory, which for most computers means hundreds of ordinary files.

Does merging reduce quality?

No. PDF pages are copied as they are, and JPG images are embedded without re-encoding, so nothing is recompressed.

Can I change the order after adding files?

Yes. Drag any row, or use the up and down arrows, and remove a file with the x button before you merge.

Can I merge password-protected PDFs?

No. Remove the password or editing restriction in the app that added it, then merge the unlocked copy.

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