Merge PDFs and images on your computer

Combine documents and images into a single PDF, reordering files and pages. Form fields are flattened into the page and bookmarks are not carried over. Free, unlimited, and no file ever gets uploaded to a server.

100% private: everything runs on your computer, your files never leave your device.

  1. Add two or more PDFs or images
  2. Drag to reorder documents and edit their pages
  3. Merge and download a single PDF with no quality loss

What Merge PDF does

Merge PDF combines two or more files into a single PDF. It accepts PDFs and also JPG, PNG and WebP images, which become pages of their own, and it offers two ways of working: Merge now, which joins the files in the order you have them and downloads the result in one step, and Review order and pages, which opens every page of every document in one grid where you can drag pages into any order, rotate them or leave some out before saving. Either way the new file is written in your browser by copying the original page objects, with no re-rendering and no loss of quality.

It is the everyday tool for paperwork that arrives in pieces: a contract and its annexes, several scanned receipts, an invoice with its delivery note, the chapters of a report exported one by one, or a mix of PDFs and photos that has to travel as one attachment. There is no account, no upload and no limit on the number of files or pages other than the memory of your device.

How to merge PDFs

  1. Add at least two files, PDFs or images. They appear in a list you can reorder by dragging; the first file gives its name to the result.
  2. For a straight join, press Merge now. The button shows the progress, the merged PDF downloads immediately with the suffix _merged and a timestamp, and the files stay on screen in case you want to reorder and merge again.
  3. To arrange pages first, press Review order and pages. Every page of every document appears as a thumbnail in a single sequence.
  4. Drag thumbnails to reorder them, even across documents, use Rotate left and Rotate right on individual pages, and exclude the pages you do not want.
  5. Press Merge PDF. The file is saved on your device and downloaded with the same suffix and timestamp.

What is preserved and what is not

Pages are copied as vector objects into a new document, so text stays selectable, fonts and images keep their resolution and vector graphics are untouched. Images added as input are converted into PDF pages locally before the merge. Because the copy works page by page, a few document-level structures do not travel with the pages.

Privacy: the merge happens on your computer

The thumbnails are rendered by the PDF engine bundled with OléPDF and the new document is assembled by a local PDF library, both running inside the browser tab. No file is uploaded, no page is sent anywhere and no third-party script is involved. The only download is OléPDF's own code from its own domain. When you close the tab, the only copies of your documents are the ones on your disk.

That is what makes it usable with contracts, medical records, bank statements or any bundle of documents you would not hand to an online service.

Typical uses

Frequently asked questions

Is Merge PDF free?

Yes. Merging is free and unlimited, with no account, no watermark, no daily cap and no limit on the number of files, whichever of the two ways you use.

Can I mix PDFs and images?

Yes. JPG, PNG and WebP images are accepted alongside PDFs and each one becomes a page of the merged document, converted locally before the merge.

What is the difference between Merge now and Review order and pages?

Merge now joins the files in list order and downloads the result straight away. Review order and pages opens all the pages in one grid so you can reorder them across documents, rotate them or exclude some before saving.

Does merging reduce quality?

No. Pages are copied as vector objects, not converted to images, so the merged PDF has the same text, fonts and image resolution as the originals.

Will the form fields still work after merging?

No. Forms are flattened: the filled values stay visible, but the fields are no longer interactive. Merge the blank forms and fill the result if you need editable fields.

Why did Merge now open the page grid instead of downloading?

Because one of the files could not be read, usually a password-protected PDF. The grid shows which one it is; unlock it with Decrypt PDF and merge again.

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Photos rather than PDFs? Try OléPIC, our image tools.