How to merge PDF files online for free
Combining PDF files takes less than a minute. Follow these four steps to merge PDFs online without installing any software.
- 1
Select your PDF files
Click “Select PDF files” or drag and drop several PDFs into the box above.
- 2
Put them in the right order
Drag files up or down, or use the arrows. Add more files or remove any you do not need.
- 3
Click Merge PDF
Your browser combines everything into one document in seconds.
- 4
Download your merged PDF
The file downloads automatically. Nothing is stored anywhere.
A simple way to combine PDFs, with nothing to install
Our PDF combiner joins separate documents into one clean file you can share, print or archive. Pages are copied exactly as they are, so your text, images and formatting stay intact.
Private and secure
Merging happens locally in your browser. Your PDFs are never uploaded, stored or shared.
Preview and reorder
See a thumbnail and page count for every file, then drag them into the order you want.
No watermark, no sign-up
Merge as many times as you like. There is no account, no limit per day and no stamp on your pages.
Why merge PDF files into one document?
Project reports
Bring chapters, charts and appendices from different authors together in one report.
Contracts and agreements
Combine the main contract, annexes and signed pages before sharing them.
Scanned documents
Join scans of several pages into a single file instead of sending many attachments.
Applications and forms
Merge your CV, certificates and ID into one PDF for job and university portals.
Tax and finance papers
Collect invoices, receipts and statements into one organised file for your accountant.
Study notes and ebooks
Combine lecture notes and readings so everything lives in one easy-to-search document.
Tips for merging PDFs the right way
- Name your files with numbers (01, 02, 03), then click Sort A–Z to put them in order instantly.
- Check the thumbnails and page counts to make sure you picked the right documents before merging.
- If the merged file is too big to email, use the Compress PDF tool afterwards.
- Unlock password-protected files first, because they cannot be merged while locked.
- Convert Word, Excel or image files to PDF before adding them to the list.
Merge PDF: frequently asked questions
Is the Apix PDF Tools merger really free?
Yes. You can merge PDF files online for free, with no account, no watermark and no daily limit. It is free to use.
Is it safe to merge confidential PDFs?
Your files are combined inside your own browser, so they are never uploaded to our servers or anyone else’s. That makes it a good fit for contracts, invoices, CVs and other private documents.
In what order will my merged PDF files appear?
Files appear in the order shown in the list, with the top file first. Drag files to reorder them, use the up and down arrows, or click “Sort A–Z” to order them by name before you merge.
How many PDF files can I combine at once?
You can merge up to 20 PDF files at a time, with a total size of up to 100 MB. If you have more, merge them in two rounds and then combine the results.
Will merging reduce the quality of my PDFs?
No. Pages are copied as they are, so text, fonts, images and layout keep their original quality. The merged file is roughly the combined size of the originals. If it is too big to email, run it through our Compress PDF tool afterwards.
Can I merge password-protected PDFs?
Not directly. Remove the password in your PDF viewer first, then add the unlocked copy. If a file is protected, we will tell you which one it is.
Can I merge PDF files with Word documents or JPG images?
This tool merges PDF files only. Convert Word documents or images to PDF first (for example by using “Print to PDF” or “Save as PDF”), then add them to the list.
How do I merge PDF files on my phone?
Open this page in your mobile browser on Android or iPhone, tap “Select PDF files”, choose your documents, use the arrows to set the order and tap Merge PDF. No app is needed.
How can I reduce the size of a merged PDF?
After merging, use our Compress PDF tool. It shrinks the images inside the file so it is easier to email or upload while staying readable.
Why was one of my files not added?
Files are skipped if they are not PDFs, are damaged, are password-protected, or would push you past the 20-file or 100 MB limit. A message above the list tells you the reason.
Need a smaller file?
Compress your merged PDF to make it easy to email and upload.
Compress PDF