About Merge PDF
A PDF merger is the quickest way to turn a pile of separate files into one document you can send, print or archive. Add your PDFs, drag them into order and download a single clean file. Nothing is uploaded, so contracts, invoices and ID scans stay private.
Need one file instead of five? Maybe you are sending a job application, a set of invoices, or scanned pages that came out as separate files. Merge PDF stitches them together in the order you pick, page for page, without touching the quality of the pages.
How to use Merge PDF
- Add your PDF files. Drag them in or click the box to browse.
- Use the arrows to put the files in the right order.
- Press Merge PDFs and download the combined file.
When to use Merge PDF
- Job applications: put your CV, cover letter and certificates in a single attachment.
- Accounts and claims: join receipts, invoices and bank statements for an expense report.
- Study: combine lecture notes, past papers and assignment pages into one revision pack.
- Scanning: stitch together pages your scanner saved as separate files.
Tips for better results
- Check the order in the list before you press Merge. The first file becomes the first pages of the result.
- If the combined file is too heavy to email, run it through Compress PDF afterwards.
- Need only some pages from each file? Use Extract Pages first, then merge the pieces.
Why use 40PDF for this?
Most online mergers upload your files to a server first. 40PDF merges inside your own browser, so the merge is fast, works with confidential paperwork and does not depend on an upload queue or a daily limit.
Merge PDF: questions and answers
Is there a limit on how many files I can merge?
There is no limit set by us. Everything happens in your browser, so the real limit is your device's memory. A few dozen normal files are no problem.
Will the merged PDF have a watermark?
No. The file you download is clean, with nothing added.
Can I merge password-protected PDFs?
Not directly. Remove the password first with the Unlock PDF tool, then merge.
How do I combine PDF files into one?
Open Merge PDF, add two or more PDFs, put them in the order you want with the arrow buttons, then press Merge PDFs. Your browser builds the new file and you download it.
Does merging change the quality of my pages?
No. Pages are copied as they are, so text stays selectable and images keep their original quality.
Can I merge PDFs on my phone?
Yes. The tool runs in any modern mobile browser on Android and iPhone. Tap the box, choose your files and merge.