Merge PDF — Combine PDF Files Into One Free Online

Drop two or more PDFs onto the tool, drag the rows to set the merge order, and click Merge my PDFs. Pages from each source PDF are copied into a single output document in your chosen order. Your files are uploaded over HTTPS and merged on our secure server, then removed under our Security policy.

You can reorder entire files (drag the row up or down), and you can remove a file from the merge with the trash icon. To reorder individual pages within a PDF, run it through our Organize PDF tool first, then merge.

Page content (text, images, fonts, hyperlinks within a page) is preserved exactly because whole pages are copied atomically rather than re-rendered. Document-level bookmarks and the table-of-contents are reset since the new file is a fresh document — re-add bookmarks with a desktop PDF editor if needed.

Each file can be up to 20MB on the Free plan, 50MB with Premium or 120MB with Pro, and you can merge up to 20 PDFs at once when signed in (signed-out runs allow fewer). Large documents use more browser and server memory, so split unusually large jobs into smaller merges.

Yes — your PDFs are uploaded over an encrypted (HTTPS) connection, retained temporarily to merge and deliver the result, then removed under our Security policy. We never sell them or use them to train models. If your policy strictly forbids any upload at all (e.g. some compliance workflows for contracts, NDAs or medical records), use a desktop PDF tool that runs fully offline instead.

If you know the password, decrypt first with our PDF Password tool, then merge. PDFs with encryption, including ones with printing or copying disabled, need to be unlocked first.

Roughly the sum of the inputs. Pages are copied as they are and duplicate fonts and images are not removed, so merging does not shrink the file. If size matters, run the merged PDF through our Compress PDF tool afterwards.

Preview and download the merged PDF without creating an account. Free allowances and file limits apply; Premium adds larger files and larger batches.

Yes — each page keeps its own dimensions in the combined file because pages are copied as-is rather than reflowed. An A4 contract, a Letter-size invoice and a landscape spreadsheet can all sit in one PDF, each at its original size. Drag the rows to control which document comes first.

Yes, but with a different tool: Split PDF extracts a page range (e.g. 5-12) into its own file, and Organize PDF lets you delete or reorder pages in the merged result. Merge only joins files together, so reach for those sibling tools when you need to take a combined PDF apart again.

Yes — click "Add more" at any time before merging; new files are appended to the end of the list with their own thumbnail rendered automatically. Drag them, or use the up/down arrow buttons, into position relative to the files already there — you don't need to restart the order from scratch.

Yes — every file row has small up/down arrow buttons next to the drag handle that move it one position at a time, which is far more reliable than a drag gesture on a touchscreen. Tap them repeatedly to walk a file to the top or bottom of the merge order.

Yes — no desktop software is needed. Drop your PDFs into the browser, reorder them, preview the merge and download the clean combined file without creating an account. Temporary files are processed over HTTPS and deleted automatically.

Almost always one of three things. The file is over the 20 MB free upload limit — Premium takes 50 MB and Pro 120 MB. The format is not one this tool accepts, so check the list shown on the upload panel. Or the file is not really the format its name says: renaming a file does not change what is inside it, and that is the reason a valid-looking PDF gets refused.

Page content is preserved, but anything that depended on the original file being interactive can behave differently — form fields, layers and annotations may be flattened into the page depending on the operation you ran. If you need the fields to stay fillable, do the flattening step last. Keep the untouched original until you have checked the output end to end.

Merge PDF supports free standard use within the published processing allowances. Free downloads are clean — no watermark. No signup is required for standard tool use. Photo effects and AI edits have a web-size limit on Free, with the original-resolution result available through Premium or one credit. Crop, resize, rotate, compress and convert stay full size. Published processing allowances and file limits still apply.

No — Merge PDF runs in the browser on desktop and phone. There is nothing to install, no trial to start, and no license to buy before you can see whether it does what you need. Try it on the file you are actually stuck with rather than a sample.

Merge PDF joins whole files one after another, so every original page stays on its own page at its own size, and it does not place several pages on one sheet. To combine pages from different PDFs into one file, merge the files as they are.

Add the PDFs to Merge PDF, drag them into the order you want and select Merge my PDFs to get the single file. The pages of each file stay together and in order, and the first file in the list supplies the first pages. Use Add more if another file turns up before you merge.

Run the merged PDF through Compress PDF and choose a level such as E-book or Screen. Merging copies pages as they are, so the merged file is about as large as the files combined. Check the After size before you send it.

Open Merge PDF in a phone or computer browser and combine the PDFs there. Choose the files, then drag the grip handle or use the up and down arrows to set the order, and select Merge my PDFs. The merged file downloads to the device you used.

Open Merge PDF, add the files and select Merge my PDFs. You can merge PDF documents free of charge, and a standard merge adds no watermark. It takes up to 10 PDFs before you sign up and up to 20 once you are signed in, and each file has to fit your plan's upload size.

Joining PDF files is the same job as merging. Add the files, arrange the list so the file that should open the document is first, and select Merge my PDFs. The pages inside each file keep their own order, and the list order decides how the files follow one another.

One merge takes up to 20 PDFs, so merge them in groups and then add the combined files to a final merge. The number on each card shows where a file lands. The total size of all files is also checked, which is another reason to merge a very large set in groups.