How to merge PDFs

pdfjoiner.com combines several files into a single PDF, in the order you choose. It accepts PDFs, images (JPG, PNG, HEIC, TIFF), and Office documents (Word, Excel, PowerPoint). Non-PDFs are converted to PDF on the fly, then everything is stitched into one file.

Step 1: Upload

Drag the files onto the page, or click to pick them. Up to 20 files at once, 50 MB each. PDFs upload as-is; images and Office documents are converted automatically.

Step 2: Arrange

Each uploaded file appears as a row. Drag rows up or down to set the order — top of the list goes first in the merged PDF, bottom goes last. Click the X on a row to drop it.

Step 3: Merge and download

When the order is right, click Merge. The combined PDF is built on the server in the order you set, and a Download button appears when it's ready. The output is a single, standard PDF.

Tips

• Mixing file types is fine. A Word cover letter, a PDF resume, and a few JPG scans of certificates merge into one PDF without any prep on your side.
• Page orientation is preserved per source. A landscape spreadsheet sandwiched between portrait pages stays landscape; PDF readers handle that.
• To extract a specific page from a long PDF, split it first with a separate tool, then merge only the part you need.

What can be tricky

Office documents render server-side. The result is faithful but not pixel-identical to the latest desktop Word or PowerPoint. Custom fonts not installed on the server will substitute. If layout fidelity matters, export to PDF on your own machine first and upload the PDF.

Mixed-resolution images. A 300 DPI scan and a low-res screenshot side by side will produce one crisp page and one blurry one. Resize before uploading if you care.

What won't work

Password-protected PDFs. Remove the password first.

Files over 50 MB. Compress or split them first.

Corrupt files. If the file won't open elsewhere, it won't merge here.

Privacy

Files are uploaded over HTTPS and processed on our server. Both the originals and the merged PDF are deleted automatically after one hour. No account required.

For more on how PDF merging works, see the Blog.