Merge PDF
Combine several PDF files into a single document.
Merge PDF joins two or more PDF files into one document directly in your browser. Add the files, drag them into the order you want, and download the combined PDF. The files are read with the File API and rewritten locally — nothing is uploaded, and there is no page limit or watermark.
Loading Merge PDF…
Runs entirely on your device. No file or text you enter here is uploaded. How to verify it.
How to use Merge PDF
- Add two or more PDF files, or drop them anywhere on the page.
- Drag the cards to set the page order of the final document.
- Press Merge and download the combined PDF.
Questions about Merge PDF
Is there a limit on how many PDFs I can merge?
No fixed limit. The practical ceiling is your device memory — every file is held in RAM while merging. On a typical laptop, a few hundred megabytes of PDFs merge without trouble; on a low-end phone, stay under roughly 50 MB in total.
Does merging reduce the quality of the pages?
No. Pages are copied object by object, so fonts, images and vector graphics arrive in the output byte-identical to the input. Merging is lossless; the output size is roughly the sum of the inputs.
Can I merge a password-protected PDF?
Not while it is encrypted. Use Remove PDF Password first with the password you already have, then merge the decrypted file.
Do bookmarks and form fields survive the merge?
Page content, annotations and links are preserved. Document-level outlines (bookmarks) and AcroForm field trees are rebuilt only for the first document, because merging two form dictionaries can silently break field names.
Can I merge PDFs on an iPhone or an iPad?
Yes. The tool runs in mobile Safari and Chrome, and the file picker reaches the Files app, iCloud Drive and Google Drive. Memory is the constraint rather than the browser: on a phone, keep the combined total under roughly 50 MB or the tab may be reclaimed part-way through.
Is it safe to merge confidential documents here?
The files are read into memory in the tab and written back out there, so there is no server-side copy and no retention policy to read. Once the page has loaded you can switch the network off and the merge still completes. What the tool cannot control is the machine itself — a shared computer is still a shared computer.
Is Merge PDF really free, with no limits?
Yes. There is no account, no daily cap, no file-size tier and no watermark, because there is no server cost to recover. The site is funded by clearly disclosed partner recommendations on the Partners page, never by metering the tools.
Are my files or text uploaded when I use Merge PDF?
No. Everything is processed by JavaScript running in your browser, on your device. You can verify it: open your browser's developer tools, switch to the Network tab, and use the tool. You will see no request carrying your data — because there is nowhere for it to go.