Drop PDF files here, or click to browse
PDF files only. They are read on this device only — nothing is uploaded anywhere.
No files yet. Add at least two PDFs to merge them.
Order matters: files merge top to bottom. Drag a file by its handle, or use the arrow buttons, to rearrange the list before merging.
Why merge PDFs here instead of uploading them somewhere?
Most "free" PDF mergers work by uploading your documents to a company's server, combining them there, and letting you download the result. That means your contracts, ID scans, bank statements and medical forms sit — at least briefly — on a stranger's machine, under a privacy policy you did not read. This tool takes the other route: the merging is done by a JavaScript library (pdf-lib) running in this browser tab. Your files are read from your own disk, combined in your device's memory, and saved straight back to your device. There is no upload because there is no server involved at all — you could disconnect from the internet after the page loads and it would still work.
The trade-offs are honest ones. A server tool can chew through a 500 MB file on hardware you do not own; this tool is limited by your device's memory, so extremely large PDFs can strain a phone. In exchange you get privacy that does not depend on trusting anyone, no sign-up wall, no daily merge limits, and no watermark stamped on your document.
How to merge PDF files
1. Add your PDFs. Drag them onto the box above, or click it and pick files from your device. Each file appears in the list with its page count and size, read locally in your browser.
2. Put them in order. Drag a file by the handle on its left, or use the up and down arrows. The merged document runs top to bottom, exactly as listed.
3. Click "Merge PDF". The pages of every file are copied, in order, into one new PDF — nothing is re-rendered or compressed, so text, images and vector graphics stay exactly as they were.
4. Save the download. Your browser downloads the combined file as merged.pdf. Open it and check the page order before you send it anywhere.
A worked example
Say you are emailing a signed agreement and need everything in a single attachment. You have contract.pdf — 3 pages — and a scan of your ID saved as id-scan.pdf — 2 pages. Add both files, drag contract.pdf above id-scan.pdf if it is not already first, and click Merge PDF. The result is one 5-page PDF: the three contract pages in their original order, followed by the two ID pages. The file is roughly the size of the two originals added together, because every page was copied as-is rather than rebuilt.
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Frequently asked questions
Is this PDF merger really free?
Yes — completely. There is no sign-up, no watermark, no page limit and no "free for the first three files" catch. The merging happens on your own device, so running the tool costs us nothing per merge, and there is nothing to charge you for.
Are my files uploaded to a server?
No. Your PDFs are read and combined entirely inside your browser using the pdf-lib library — they never leave your device, nothing is stored anywhere, and closing the tab clears everything. This is the main reason to use this tool for contracts, ID scans, statements and other documents you would rather not hand to a stranger's server.
Is there a file size limit?
There is no limit set by us, because there is no server to limit you. The practical limit is your device's memory: dozens of ordinary PDFs, or scans totaling a few hundred megabytes, merge fine on a typical laptop. Very large files on an older phone can run out of memory — if a merge fails, try fewer or smaller files, or use a desktop browser.
Does merging reduce the quality of my PDFs?
No. Pages are copied into the merged file exactly as they are — text stays as sharp selectable text, images keep their original resolution, and nothing is re-compressed or re-rendered. The merged file is roughly the sum of the originals' sizes. One honest exception: document outlines (bookmarks), internal links and interactive form fields from the source files are not carried over — the visible page content always is.
Can I merge a password-protected PDF?
No — and the tool will tell you plainly if a file is password-protected instead of failing silently. A protected PDF is encrypted, and this tool cannot (and should not) open it without the password. If it is your document, remove the password first — most PDF apps can save an unprotected copy, and printing the file to PDF also produces one — then merge that copy.
How do I change the order of the files before merging?
Drag any file by the handle on the left of its row, or use the up and down arrow buttons on the right. The list order is the page order: the merged PDF starts with the first file's pages, then the second file's, and so on. Check the page counts in the list before you click Merge — the total under the list shows exactly how many pages the result will have.