Merge PDF Online Free

Frequently asked questions

How do I merge PDFs online?

Click the button to add one or more PDF files from your device. They appear in a list below. Drag the rows to change the order of the documents. When you are happy with the order, click "Merge PDF" to create a single PDF and download it. The process runs entirely in your browser, so your files never leave your device.

Can I reorder the pages?

You reorder whole documents, not individual pages. Drag the file rows up or down to set the order in which each PDF appears in the merged file. The pages of each PDF keep their internal order; the merged PDF is document 1's pages, then document 2's, and so on. If you need to reorder single pages within a PDF, you would need a separate tool that supports page-level editing.

Are my PDFs sent to a server?

No. Merging is done locally in your browser. Your files never leave your device or get stored on our servers. This keeps your documents private and secure. You can merge sensitive or confidential PDFs without any upload.

Is there a limit to how many PDFs I can merge?

There is no fixed limit in the tool. Very large numbers of files or very big PDFs may make the browser use a lot of memory and take longer. For typical documents (e.g. a few dozen PDFs of a few MB each), merging works without issues. If you hit performance limits, try merging in smaller batches and then merging the resulting PDFs.

Does merging reduce PDF quality?

No. The tool combines the existing content of your PDFs without re-encoding or re-compressing the pages. Text and images in the merged PDF stay at the same quality as in the originals. The output is a single PDF that behaves like one continuous document.

Can I remove a file from the list before merging?

Yes. Each file in the list has a remove or delete option so you can take it out before clicking Merge. Reorder the remaining files as needed, then merge. If you change your mind, add the file again and adjust the order.

What happens to bookmarks and links in the PDFs?

Bookmarks and internal links from the original PDFs are preserved in the merged file where the library supports it. Very complex PDFs with nested bookmarks may have simplified structure in the result. External links and hyperlinks generally remain clickable in the merged PDF.

Does it work on mobile?

Yes. The tool runs in the mobile browser (Safari on iPhone, Chrome or others on Android). You can add PDFs from your device or cloud storage, reorder them, and download the merged file. No app install is required; processing happens in the browser so file size limits depend on your device's memory.

Can I merge password-protected PDFs?

Password-protected (encrypted) PDFs must be unlocked first before this tool can read them. Open the PDF with the correct password in another app, save it without password protection, then use that copy here. The merge tool itself does not ask for or handle PDF passwords.

Can I merge scanned PDFs or image-based PDFs?

Yes. Scanned PDFs (where each page is an image) merge the same way as text-based PDFs. The tool combines all pages into one PDF without re-processing the images. The merged file will be larger if you add many heavy scanned documents, because the original image data is kept. For very large sets of scans, consider compressing the PDFs first with a separate tool if you need a smaller final size.

What happens if a PDF is corrupted or won't load?

If one of your PDFs is damaged or in an unsupported format, the merge may fail or the tool may show an error. Remove the problematic file from the list and try again with the rest. If the PDF opens in another reader but not here, it may use features (e.g. certain encryption or attachments) that the in-browser library does not support. Saving a fresh copy from that reader as a standard PDF often fixes the issue.

Is the merged PDF searchable if the originals were searchable?

Yes. When you merge PDFs that contain selectable text (searchable PDFs), the merged file keeps that text layer. You can still search and copy text in the result. If you merge PDFs that are scan-only (image-based) with no text layer, the merged PDF will also have no searchable text unless you run OCR separately. The tool does not add or remove text; it only combines the pages as they are.