Merge PDF files
Combine two or more PDFs into a single document, in seconds. Your files are never stored anywhere.
- Never stored
- No queue, no waiting
- No signup, no watermark
How it works
Add your PDFs
Drop two or more PDF files onto the page, or click to pick them from your device.
Put them in order
Move files up or down until the order matches the document you want.
Merge and download
Click Merge PDF and your combined file downloads instantly — no queue, no waiting.
What a merged file keeps, and what it drops
Pages are copied into a newly created document, object by object, and everything a page refers to travels with it. Nothing is shared between the files, though: if two of your documents embed the same font, the merged file carries two copies of it. A merge therefore lands at roughly the sum of its inputs rather than below them.
What comes across is what belongs to a page — link and comment annotations, the page boxes, each page's own rotation. A cross-reference inside one of the files still lands on the right page, because every page is copied in a single pass and the link destinations are remapped along with them. What stays behind is what belonged to the document: the bookmark outline, page labels, file attachments, the tag structure a screen reader follows, and the title, author and keywords, which the new file inherits from none of its sources.
Form fields deserve a precise answer. Each field's widget is copied with the page it sits on, so a filled-in answer stays visible exactly where it was — but the document-level form dictionary that registers those widgets as a form is not rebuilt, and readers will no longer treat the result as one. A merged file looks right and is not fillable.
When you want something else
When the merged file has to keep its outline, its tags or a working form, qpdf will do the join without losing them, provided one file stays the primary document: qpdf first.pdf --pages . second.pdf -- merged.pdf appends the second file's pages to the first and keeps the first document's bookmarks, tag tree, language and document information. It is free, it is one small binary, and it works on files far larger than a browser tab can hold.
Frequently asked questions
Is it really free?
Yes. Merging is free with no signup, no watermark and no daily nag limits. The whole operation costs us almost nothing to offer — ads on the page keep it free.
Are my PDF files stored on a server?
No. This tool stores nothing at all. Your files are never stored, never logged and never seen by us. You can even switch off your internet after the page loads and merging still works.
How many PDFs can I merge at once?
There is no fixed file count. The practical limit is your device's memory — roughly 100 MB of combined PDFs works comfortably on a normal phone or laptop.
Will the quality of my PDFs change?
No. Pages are copied into the new document exactly as they are — text, images and formatting are untouched. Merging never recompresses or rescales your content.
Can I change the page order before merging?
You can reorder whole files before merging. To rearrange individual pages, merge first and then use Rearrange PDF pages, which lets you drag single pages into any order.
Does it work with password-protected PDFs?
Encrypted PDFs can't be merged directly — run them through Unlock PDF first (you need the password), then merge.
Good to know: Very large files (hundreds of MB) can exceed your browser's memory on low-end phones. If a merge fails, try fewer files at a time — or a desktop browser, which allows more memory.
Put this tool on your website
Free for any blog, class page or help article. Paste one snippet and your visitors can use it right on your page.