Free Tool · Runs in your browser

Merge PDF files in one click

Combine two or more PDFs into a single document. Drag to reorder, then download — your files never leave your device.

Free PDF Tools by Beusoft Files stay on your device No signup, no watermark 100% free See all free tools

Drop PDF files here

or click to browse — add 2 or more PDFs to merge

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Tip: Drag rows in the list to change the order in which PDFs are merged. The first file goes first in the output.
About this tool

Merging PDFs is one of those small chores that shows up at the worst possible moment — right before you email a client, submit a proposal or upload a multi-part report. Our free Merge PDF tool combines two or more PDFs into a single, properly ordered document in seconds, directly inside your browser. There is no upload, no signup, no watermark and no file-size cap to nudge you toward a paid plan.

Because everything runs locally with pdf-lib, the documents you drop in never touch our servers. That matters when you are merging signed contracts, financial statements, medical forms or anything else you would rather not hand to a third party. Below you will find a step-by-step walkthrough, the most common situations people use it for, and answers to the questions we get asked most.

How to use

How to use Merge PDF

  1. Drop your PDFs into the upload zone — drag them in from your desktop, or click Select PDF files to browse. Add two or more files to enable the merge button.
  2. Reorder pages if needed. Each file appears as a row in the list. Grab the row by its drag handle and slide it up or down — the file at the top becomes the first section of the merged PDF.
  3. Remove anything you do not need by clicking the × on the right side of any row. Add more files at any point by dragging them into the zone again.
  4. Click "Merge PDFs & download" when the order looks right. The tool processes each file in turn and shows a live progress bar.
  5. Save the merged file. Your browser will download a single PDF named merged.pdf. Open it to confirm the page order, and you are done.

Most files merge in under two seconds. Very large or image-heavy PDFs may take a moment longer, but everything stays on your machine — nothing is uploaded.

Why use this

Why use our Merge PDF?

Private by design

Files are merged in your browser using WebAssembly. They are never uploaded, stored, scanned or shared.

Drag to reorder

Re-arrange files visually before merging. No more renaming PDFs to "01-…", "02-…" just to control the order.

No file limit

Combine two PDFs or two hundred. The tool handles them sequentially so memory use stays sensible.

No watermark, no signup

You will not be asked for an email, asked to "upgrade", or shipped a watermark across every page.

Works on any device

Tested on Chrome, Edge, Firefox and Safari, on Windows, macOS, Linux, iPad and Android.

Fast, even offline

Once the page is loaded, merging works even with no internet connection — useful on flights or in coffee-shop Wi-Fi.

Who it’s for

Common use cases

  • Submitting a proposal or tender. Combine the cover letter, technical response, CV pack and price sheet into a single document the buyer can review without juggling tabs.
  • Sending a signed contract bundle. Merge the contract, signed NDA, scope-of-work and signed change orders so the final record is one file, in the right order.
  • Putting together a portfolio. Designers, architects and consultants often need to stitch 4–10 case-study PDFs into one polished portfolio for a job application.
  • Closing the books at month-end. Accountants merge invoices, bank statements and receipts into one PDF per month for cleaner archives.
  • Combining academic papers. Students and researchers merge chapters, appendices and bibliographies into a single submission file.
  • Compiling an evidence pack. Lawyers and HR teams build single-file evidence bundles for hearings, audits or insurance claims.
FAQ

Frequently asked questions

Are my PDF files uploaded to your server when I merge them?
No. The Merge PDF tool runs entirely in your browser using the pdf-lib JavaScript library. Your files are read into memory locally, combined locally, and written out locally. Nothing is uploaded to Beusoft or any third party, and nothing is retained after you leave the page.
How many PDFs can I merge at once?
There is no enforced limit. We have tested 100+ files of mixed sizes without issue. Practical limits come from your device — older phones may slow down with hundreds of large PDFs, but desktops and modern laptops handle big batches easily.
Does the tool preserve form fields, links, bookmarks or signatures?
It preserves the page content, embedded fonts, images, links and form widgets that pdf-lib understands. Cryptographic signatures are stripped after merging (this is unavoidable — the signed bytes have changed), and complex form logic can be flattened. For legal documents that must remain signed, sign the merged PDF instead of merging signed PDFs.
Can I reorder pages within a single PDF, not just whole files?
Not in this tool — Merge PDF works at the file level. To rearrange individual pages, rotate them or delete some, use our free Edit PDF tool, which operates at the page level.
My file is password-protected. Will it still merge?
Standard owner-password PDFs (which only restrict editing) merge fine. PDFs encrypted with a user-password (you need a password to open them) will not load. Decrypt them first with your PDF reader, then come back.
Is there a maximum file-size per PDF?
There is no fixed limit, but the browser must hold every file in memory at once. As a rough guide, modern desktops can comfortably merge ~500 MB worth of PDFs; older mobiles cap out lower. If you hit a memory error, merge in smaller batches and combine the batches.
Why use this instead of Adobe Acrobat or the Smallpdf paid plan?
Because you usually need merging two or three times a month, not enough to justify a subscription. This tool is free, requires no install, no signup and no upload — which is also why it is faster: there is no round trip to a server.

Privacy & safety

Every operation in this tool happens locally inside your browser. PDFs are read into memory, merged with the open-source pdf-lib library, and written back out as a download — without ever leaving your device. We do not log file names, contents, or any user-identifying data tied to your merge action.